678937497 has 8 divisors (see below), whose sum is σ = 1034571456. Its totient is φ = 387964272.

The previous prime is 678937487. The next prime is 678937537. The reversal of 678937497 is 794739876.

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

It is not a de Polignac number, because 678937497 - 2¹⁰ = 678936473 is a prime.

It is a super-2 number, since 2×678937497² = 921912249665250018, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 678937497.

It is not an unprimeable number, because it can be changed into a prime (678937447) 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, 16165158 + ... + 16165199.

It is an arithmetic number, because the mean of its divisors is an integer number (129321432).

Almost surely, 2^678937497 is an apocalyptic number.

It is an amenable number.

678937497 is a deficient number, since it is larger than the sum of its proper divisors (355633959).

678937497 is a wasteful number, since it uses less digits than its factorization.

678937497 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 32330367.

The product of its digits is 16003008, while the sum is 60.

The square root of 678937497 is about 26056.4290914929. The cubic root of 678937497 is about 878.9076912957.

The spelling of 678937497 in words is "six hundred seventy-eight million, nine hundred thirty-seven thousand, four hundred ninety-seven".