699655401 has 15 divisors (see below), whose sum is σ = 1045519981. Its totient is φ = 466278228.

The previous prime is 699655393. The next prime is 699655409. The reversal of 699655401 is 104556996.

It is a happy number.

The square root of 699655401 is 26451.

It is a perfect power (a square), and thus also a powerful number.

699655401 is a `hidden beast` number, since 6 + 9 + 96 + 554 + 0 + 1 = 666.

It is an interprime number because it is at equal distance from previous prime (699655393) and next prime (699655409).

It is not a de Polignac number, because 699655401 - 2³ = 699655393 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (699655409) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 14 ways as a sum of consecutive naturals, for example, 236590 + ... + 239528.

Almost surely, 2^699655401 is an apocalyptic number.

699655401 is the 26451-st square number.

699655401 is the 13226-th centered octagonal number.

It is an amenable number.

699655401 is a deficient number, since it is larger than the sum of its proper divisors (345864580).

699655401 is an frugal number, since it uses more digits than its factorization.

699655401 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5890 (or 2942 counting only the distinct ones).

The product of its (nonzero) digits is 291600, while the sum is 45.

The cubic root of 699655401 is about 887.7582774316.

Multiplying 699655401 by its product of nonzero digits (291600), we get a square (204019514931600 = 14283540²).

It can be divided in two parts, 699 and 655401, that added together give a square (656100 = 810²).

The spelling of 699655401 in words is "six hundred ninety-nine million, six hundred fifty-five thousand, four hundred one".