679909137 has 16 divisors (see below), whose sum is σ = 918267840. Its totient is φ = 447442112.

The previous prime is 679909127. The next prime is 679909183. The reversal of 679909137 is 731909976.

It is a cyclic number.

It is not a de Polignac number, because 679909137 - 2¹⁴ = 679892753 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 679909137.

It is not an unprimeable number, because it can be changed into a prime (679909127) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 90439 + ... + 97667.

It is an arithmetic number, because the mean of its divisors is an integer number (57391740).

Almost surely, 2^679909137 is an apocalyptic number.

It is an amenable number.

679909137 is a deficient number, since it is larger than the sum of its proper divisors (238358703).

679909137 is a wasteful number, since it uses less digits than its factorization.

679909137 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7632.

The product of its (nonzero) digits is 642978, while the sum is 51.

The square root of 679909137 is about 26075.0673441125. The cubic root of 679909137 is about 879.3267651248.

The spelling of 679909137 in words is "six hundred seventy-nine million, nine hundred nine thousand, one hundred thirty-seven".