1972931929 has 4 divisors (see below), whose sum is σ = 1973736720. Its totient is φ = 1972127140.

The previous prime is 1972931921. The next prime is 1972931959. The reversal of 1972931929 is 9291392791.

It is a happy number.

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 1972931929 - 2³ = 1972931921 is a prime.

It is a super-2 number, since 2×1972931929² = 7784920792935322082, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1972931921) 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, 398707 + ... + 403624.

It is an arithmetic number, because the mean of its divisors is an integer number (493434180).

Almost surely, 2^1972931929 is an apocalyptic number.

It is an amenable number.

1972931929 is a deficient number, since it is larger than the sum of its proper divisors (804791).

1972931929 is an equidigital number, since it uses as much as digits as its factorization.

1972931929 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 804790.

The product of its digits is 551124, while the sum is 52.

The square root of 1972931929 is about 44417.6983757601. The cubic root of 1972931929 is about 1254.2112743880.

The spelling of 1972931929 in words is "one billion, nine hundred seventy-two million, nine hundred thirty-one thousand, nine hundred twenty-nine".