1961929972 has 6 divisors (see below), whose sum is σ = 3433377458. Its totient is φ = 980964984.

The previous prime is 1961929961. The next prime is 1961930027. The reversal of 1961929972 is 2799291691.

It can be written as a sum of positive squares in only one way, i.e., 1687895056 + 274034916 = 41084^2 + 16554^2 .

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 245241243 + ... + 245241250.

Almost surely, 2^1961929972 is an apocalyptic number.

It is an amenable number.

1961929972 is a deficient number, since it is larger than the sum of its proper divisors (1471447486).

1961929972 is a wasteful number, since it uses less digits than its factorization.

1961929972 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 490482497 (or 490482495 counting only the distinct ones).

The product of its digits is 1102248, while the sum is 55.

The square root of 1961929972 is about 44293.6786912083. The cubic root of 1961929972 is about 1251.8755783837.

The spelling of 1961929972 in words is "one billion, nine hundred sixty-one million, nine hundred twenty-nine thousand, nine hundred seventy-two".