1397917712 has 10 divisors (see below), whose sum is σ = 2708465598. Its totient is φ = 698958848.

The previous prime is 1397917699. The next prime is 1397917727. The reversal of 1397917712 is 2177197931.

It can be written as a sum of positive squares in only one way, i.e., 722749456 + 675168256 = 26884^2 + 25984^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 43684913 + ... + 43684944.

Almost surely, 2^1397917712 is an apocalyptic number.

It is an amenable number.

1397917712 is a deficient number, since it is larger than the sum of its proper divisors (1310547886).

1397917712 is an equidigital number, since it uses as much as digits as its factorization.

1397917712 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 87369865 (or 87369859 counting only the distinct ones).

The product of its digits is 166698, while the sum is 47.

The square root of 1397917712 is about 37388.7377695477. The cubic root of 1397917712 is about 1118.1340400795.

The spelling of 1397917712 in words is "one billion, three hundred ninety-seven million, nine hundred seventeen thousand, seven hundred twelve".