699397 has 4 divisors (see below), whose sum is σ = 740556. Its totient is φ = 658240.

The previous prime is 699383. The next prime is 699401. The reversal of 699397 is 793996.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 474721 + 224676 = 689^2 + 474^2 .

It is a de Polignac number, because none of the positive numbers 2^k-699397 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (699367) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 20554 + ... + 20587.

It is an arithmetic number, because the mean of its divisors is an integer number (185139).

2⁶⁹⁹³⁹⁷ is an apocalyptic number.

It is an amenable number.

699397 is a deficient number, since it is larger than the sum of its proper divisors (41159).

699397 is a wasteful number, since it uses less digits than its factorization.

699397 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 41158.

The product of its digits is 91854, while the sum is 43.

The square root of 699397 is about 836.2995874685. The cubic root of 699397 is about 88.7648973207.

The spelling of 699397 in words is "six hundred ninety-nine thousand, three hundred ninety-seven".