697213439 has 8 divisors (see below), whose sum is σ = 752327520. Its totient is φ = 642311136.

The previous prime is 697213423. The next prime is 697213453. The reversal of 697213439 is 934312796.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 697213439 - 2⁴ = 697213423 is a prime.

It is a super-2 number, since 2×697213439² = 972213159044413442, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 697213439.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (697213409) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 46067 + ... + 59300.

It is an arithmetic number, because the mean of its divisors is an integer number (94040940).

Almost surely, 2^697213439 is an apocalyptic number.

697213439 is a deficient number, since it is larger than the sum of its proper divisors (55114081).

697213439 is a wasteful number, since it uses less digits than its factorization.

697213439 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 105889.

The product of its digits is 244944, while the sum is 44.

The square root of 697213439 is about 26404.7995447797. The cubic root of 697213439 is about 886.7242450564.

The spelling of 697213439 in words is "six hundred ninety-seven million, two hundred thirteen thousand, four hundred thirty-nine".