1396911917 has 4 divisors (see below), whose sum is σ = 1403176320. Its totient is φ = 1390647516.

The previous prime is 1396911881. The next prime is 1396911931. The reversal of 1396911917 is 7191196931.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 1396911917 - 2⁸ = 1396911661 is a prime.

It is a super-2 number, since 2×1396911917² = 3902725807713229778, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1396910917) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3131867 + ... + 3132312.

It is an arithmetic number, because the mean of its divisors is an integer number (350794080).

Almost surely, 2^1396911917 is an apocalyptic number.

It is an amenable number.

1396911917 is a deficient number, since it is larger than the sum of its proper divisors (6264403).

1396911917 is an equidigital number, since it uses as much as digits as its factorization.

1396911917 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6264402.

The product of its digits is 91854, while the sum is 47.

The square root of 1396911917 is about 37375.2848417239. The cubic root of 1396911917 is about 1117.8658117370.

The spelling of 1396911917 in words is "one billion, three hundred ninety-six million, nine hundred eleven thousand, nine hundred seventeen".