74531861 has 2 divisors, whose sum is σ = 74531862. Its totient is φ = 74531860.

The previous prime is 74531797. The next prime is 74531879. The reversal of 74531861 is 16813547.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 71402500 + 3129361 = 8450^2 + 1769^2 .

It is a cyclic number.

It is not a de Polignac number, because 74531861 - 2⁶ = 74531797 is a prime.

It is a Sophie Germain prime.

It is a Chen prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (74531881) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 37265930 + 37265931.

It is an arithmetic number, because the mean of its divisors is an integer number (37265931).

Almost surely, 2^74531861 is an apocalyptic number.

It is an amenable number.

74531861 is a deficient number, since it is larger than the sum of its proper divisors (1).

74531861 is an equidigital number, since it uses as much as digits as its factorization.

74531861 is an evil number, because the sum of its binary digits is even.

The product of its digits is 20160, while the sum is 35.

The square root of 74531861 is about 8633.1837117022. The cubic root of 74531861 is about 420.8370701974.

The spelling of 74531861 in words is "seventy-four million, five hundred thirty-one thousand, eight hundred sixty-one".