1973311857 has 12 divisors (see below), whose sum is σ = 3109461264. Its totient is φ = 1195946520.

The previous prime is 1973311807. The next prime is 1973311897. The reversal of 1973311857 is 7581133791.

It is not a de Polignac number, because 1973311857 - 2⁷ = 1973311729 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1973311807) 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, 9966123 + ... + 9966320.

It is an arithmetic number, because the mean of its divisors is an integer number (259121772).

Almost surely, 2^1973311857 is an apocalyptic number.

It is an amenable number.

1973311857 is a deficient number, since it is larger than the sum of its proper divisors (1136149407).

1973311857 is a wasteful number, since it uses less digits than its factorization.

1973311857 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19932460 (or 19932457 counting only the distinct ones).

The product of its digits is 158760, while the sum is 45.

The square root of 1973311857 is about 44421.9749335844. The cubic root of 1973311857 is about 1254.2917771481.

The spelling of 1973311857 in words is "one billion, nine hundred seventy-three million, three hundred eleven thousand, eight hundred fifty-seven".