699764138 has 16 divisors (see below), whose sum is σ = 1076007240. Its totient is φ = 341107200.

The previous prime is 699764099. The next prime is 699764159. The reversal of 699764138 is 831467996.

It can be written as a sum of positive squares in 4 ways, for example, as 210337009 + 489427129 = 14503^2 + 22123^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 699764138.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 184178 + ... + 187938.

Almost surely, 2^699764138 is an apocalyptic number.

699764138 is a deficient number, since it is larger than the sum of its proper divisors (376243102).

699764138 is a wasteful number, since it uses less digits than its factorization.

699764138 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6073.

The product of its digits is 1959552, while the sum is 53.

The square root of 699764138 is about 26453.0553622828. The cubic root of 699764138 is about 887.8042653905.

The spelling of 699764138 in words is "six hundred ninety-nine million, seven hundred sixty-four thousand, one hundred thirty-eight".