1391691104 has 12 divisors (see below), whose sum is σ = 2739891924. Its totient is φ = 695845536.

The previous prime is 1391691089. The next prime is 1391691139. The reversal of 1391691104 is 4011961931.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21745142 + ... + 21745205.

It is an arithmetic number, because the mean of its divisors is an integer number (228324327).

Almost surely, 2^1391691104 is an apocalyptic number.

It is an amenable number.

1391691104 is a deficient number, since it is larger than the sum of its proper divisors (1348200820).

1391691104 is an equidigital number, since it uses as much as digits as its factorization.

1391691104 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 43490357 (or 43490349 counting only the distinct ones).

The product of its (nonzero) digits is 5832, while the sum is 35.

The square root of 1391691104 is about 37305.3763417554. The cubic root of 1391691104 is about 1116.4714374471.

The spelling of 1391691104 in words is "one billion, three hundred ninety-one million, six hundred ninety-one thousand, one hundred four".