689976397 has 8 divisors (see below), whose sum is σ = 753924960. Its totient is φ = 626231760.

The previous prime is 689976383. The next prime is 689976437. The reversal of 689976397 is 793679986.

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

It is a de Polignac number, because none of the positive numbers 2^k-689976397 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 (689976347) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 43858 + ... + 57475.

It is an arithmetic number, because the mean of its divisors is an integer number (94240620).

Almost surely, 2^689976397 is an apocalyptic number.

It is an amenable number.

689976397 is a deficient number, since it is larger than the sum of its proper divisors (63948563).

689976397 is a wasteful number, since it uses less digits than its factorization.

689976397 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 101963.

The product of its digits is 30862944, while the sum is 64.

The square root of 689976397 is about 26267.4017938585. The cubic root of 689976397 is about 883.6455163173.

The spelling of 689976397 in words is "six hundred eighty-nine million, nine hundred seventy-six thousand, three hundred ninety-seven".