1391680975 has 6 divisors (see below), whose sum is σ = 1725684440. Its totient is φ = 1113344760.

The previous prime is 1391680937. The next prime is 1391680991. The reversal of 1391680975 is 5790861931.

It is not a de Polignac number, because 1391680975 - 2⁷ = 1391680847 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 27833595 + ... + 27833644.

Almost surely, 2^1391680975 is an apocalyptic number.

1391680975 is a deficient number, since it is larger than the sum of its proper divisors (334003465).

1391680975 is an equidigital number, since it uses as much as digits as its factorization.

1391680975 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 55667249 (or 55667244 counting only the distinct ones).

The product of its (nonzero) digits is 408240, while the sum is 49.

The square root of 1391680975 is about 37305.2405835963. The cubic root of 1391680975 is about 1116.4687288080.

The spelling of 1391680975 in words is "one billion, three hundred ninety-one million, six hundred eighty thousand, nine hundred seventy-five".