1390202497 has 4 divisors (see below), whose sum is σ = 1410951856. Its totient is φ = 1369453140.

The previous prime is 1390202479. The next prime is 1390202503. The reversal of 1390202497 is 7942020931.

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 1390202497 - 2²³ = 1381813889 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1390202447) 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, 10374579 + ... + 10374712.

It is an arithmetic number, because the mean of its divisors is an integer number (352737964).

Almost surely, 2^1390202497 is an apocalyptic number.

It is an amenable number.

1390202497 is a deficient number, since it is larger than the sum of its proper divisors (20749359).

1390202497 is an equidigital number, since it uses as much as digits as its factorization.

1390202497 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20749358.

The product of its (nonzero) digits is 27216, while the sum is 37.

The square root of 1390202497 is about 37285.4193619973. The cubic root of 1390202497 is about 1116.0732216553.

The spelling of 1390202497 in words is "one billion, three hundred ninety million, two hundred two thousand, four hundred ninety-seven".