1397502973 has 4 divisors (see below), whose sum is σ = 1398859488. Its totient is φ = 1396146460.

The previous prime is 1397502937. The next prime is 1397503031. The reversal of 1397502973 is 3792057931.

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 1397502973 - 2⁹ = 1397502461 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 (1397502473) 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, 676711 + ... + 678772.

It is an arithmetic number, because the mean of its divisors is an integer number (349714872).

Almost surely, 2^1397502973 is an apocalyptic number.

It is an amenable number.

1397502973 is a deficient number, since it is larger than the sum of its proper divisors (1356515).

1397502973 is a wasteful number, since it uses less digits than its factorization.

1397502973 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1356514.

The product of its (nonzero) digits is 357210, while the sum is 46.

The square root of 1397502973 is about 37383.1910489193. The cubic root of 1397502973 is about 1118.0234518673.

The spelling of 1397502973 in words is "one billion, three hundred ninety-seven million, five hundred two thousand, nine hundred seventy-three".