1974746881 has 2 divisors, whose sum is σ = 1974746882. Its totient is φ = 1974746880.

The previous prime is 1974746867. The next prime is 1974746887. The reversal of 1974746881 is 1886474791.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1952844481 + 21902400 = 44191^2 + 4680^2 .

It is a cyclic number.

It is not a de Polignac number, because 1974746881 - 2⁹ = 1974746369 is a prime.

It is a super-2 number, since 2×1974746881² = 7799250488038456322, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (1974746887) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 987373440 + 987373441.

It is an arithmetic number, because the mean of its divisors is an integer number (987373441).

Almost surely, 2^1974746881 is an apocalyptic number.

It is an amenable number.

1974746881 is a deficient number, since it is larger than the sum of its proper divisors (1).

1974746881 is an equidigital number, since it uses as much as digits as its factorization.

1974746881 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2709504, while the sum is 55.

The square root of 1974746881 is about 44438.1241840832. The cubic root of 1974746881 is about 1254.5957505010.

The spelling of 1974746881 in words is "one billion, nine hundred seventy-four million, seven hundred forty-six thousand, eight hundred eighty-one".