699431 has 4 divisors (see below), whose sum is σ = 740592. Its totient is φ = 658272.

The previous prime is 699427. The next prime is 699437. The reversal of 699431 is 134996.

699431 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is a cyclic number.

It is not a de Polignac number, because 699431 - 2² = 699427 is a prime.

It is a super-2 number, since 2×699431² = 978407447522, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (699437) 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, 20555 + ... + 20588.

It is an arithmetic number, because the mean of its divisors is an integer number (185148).

2⁶⁹⁹⁴³¹ is an apocalyptic number.

699431 is a deficient number, since it is larger than the sum of its proper divisors (41161).

699431 is a wasteful number, since it uses less digits than its factorization.

699431 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 41160.

The product of its digits is 5832, while the sum is 32.

The square root of 699431 is about 836.3199148651. The cubic root of 699431 is about 88.7663356824.

The spelling of 699431 in words is "six hundred ninety-nine thousand, four hundred thirty-one".