974628181 has 2 divisors, whose sum is σ = 974628182. Its totient is φ = 974628180.

The previous prime is 974628167. The next prime is 974628217. The reversal of 974628181 is 181826479.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 756800100 + 217828081 = 27510^2 + 14759^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-974628181 is a prime.

It is a super-2 number, since 2×974628181² = 1899800182398737522, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (974628481) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 487314090 + 487314091.

It is an arithmetic number, because the mean of its divisors is an integer number (487314091).

Almost surely, 2^974628181 is an apocalyptic number.

It is an amenable number.

974628181 is a deficient number, since it is larger than the sum of its proper divisors (1).

974628181 is an equidigital number, since it uses as much as digits as its factorization.

974628181 is an evil number, because the sum of its binary digits is even.

The product of its digits is 193536, while the sum is 46.

The square root of 974628181 is about 31219.0355552506. The cubic root of 974628181 is about 991.4701759728.

The spelling of 974628181 in words is "nine hundred seventy-four million, six hundred twenty-eight thousand, one hundred eighty-one".