1390374949 has 4 divisors (see below), whose sum is σ = 1394845920. Its totient is φ = 1385903980.

The previous prime is 1390374941. The next prime is 1390374959. The reversal of 1390374949 is 9494730931.

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 1390374949 - 2³ = 1390374941 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1390374941) 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, 2235019 + ... + 2235640.

It is an arithmetic number, because the mean of its divisors is an integer number (348711480).

Almost surely, 2^1390374949 is an apocalyptic number.

It is an amenable number.

1390374949 is a deficient number, since it is larger than the sum of its proper divisors (4470971).

1390374949 is an equidigital number, since it uses as much as digits as its factorization.

1390374949 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4470970.

The product of its (nonzero) digits is 734832, while the sum is 49.

The square root of 1390374949 is about 37287.7318832884. The cubic root of 1390374949 is about 1116.1193686738.

The spelling of 1390374949 in words is "one billion, three hundred ninety million, three hundred seventy-four thousand, nine hundred forty-nine".