699381 has 8 divisors (see below), whose sum is σ = 1036160. Its totient is φ = 466236.

The previous prime is 699379. The next prime is 699383. The reversal of 699381 is 183996.

It is an interprime number because it is at equal distance from previous prime (699379) and next prime (699383).

It is not a de Polignac number, because 699381 - 2¹ = 699379 is a prime.

It is a super-2 number, since 2×699381² = 978267566322, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is a zygodrome in base 4.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (699383) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 12925 + ... + 12978.

It is an arithmetic number, because the mean of its divisors is an integer number (129520).

2⁶⁹⁹³⁸¹ is an apocalyptic number.

It is an amenable number.

699381 is a deficient number, since it is larger than the sum of its proper divisors (336779).

699381 is a wasteful number, since it uses less digits than its factorization.

699381 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25912 (or 25906 counting only the distinct ones).

The product of its digits is 11664, while the sum is 36.

The square root of 699381 is about 836.2900214638. The cubic root of 699381 is about 88.7642204285.

The spelling of 699381 in words is "six hundred ninety-nine thousand, three hundred eighty-one".