1397908143 has 12 divisors (see below), whose sum is σ = 2020171608. Its totient is φ = 931490640.

The previous prime is 1397908129. The next prime is 1397908151. The reversal of 1397908143 is 3418097931.

It is not a de Polignac number, because 1397908143 - 2⁵ = 1397908111 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1397908103) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 17005 + ... + 55542.

It is an arithmetic number, because the mean of its divisors is an integer number (168347634).

Almost surely, 2^1397908143 is an apocalyptic number.

1397908143 is a deficient number, since it is larger than the sum of its proper divisors (622263465).

1397908143 is a wasteful number, since it uses less digits than its factorization.

1397908143 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 74694 (or 74691 counting only the distinct ones).

The product of its (nonzero) digits is 163296, while the sum is 45.

The square root of 1397908143 is about 37388.6098029868. The cubic root of 1397908143 is about 1118.1314887970.

The spelling of 1397908143 in words is "one billion, three hundred ninety-seven million, nine hundred eight thousand, one hundred forty-three".