1973439957 has 16 divisors (see below), whose sum is σ = 2642492160. Its totient is φ = 1310020800.

The previous prime is 1973439953. The next prime is 1973439967. The reversal of 1973439957 is 7599343791.

It is not a de Polignac number, because 1973439957 - 2² = 1973439953 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1973439897 and 1973439906.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1973439953) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 853519 + ... + 855827.

It is an arithmetic number, because the mean of its divisors is an integer number (165155760).

Almost surely, 2^1973439957 is an apocalyptic number.

It is an amenable number.

1973439957 is a deficient number, since it is larger than the sum of its proper divisors (669052203).

1973439957 is a wasteful number, since it uses less digits than its factorization.

1973439957 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3404.

The product of its digits is 6429780, while the sum is 57.

The square root of 1973439957 is about 44423.4167641347. The cubic root of 1973439957 is about 1254.3189178658.

The spelling of 1973439957 in words is "one billion, nine hundred seventy-three million, four hundred thirty-nine thousand, nine hundred fifty-seven".