74481961 has 2 divisors, whose sum is σ = 74481962. Its totient is φ = 74481960.

The previous prime is 74481949. The next prime is 74481983. The reversal of 74481961 is 16918447.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 72675625 + 1806336 = 8525^2 + 1344^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-74481961 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (74481661) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 37240980 + 37240981.

It is an arithmetic number, because the mean of its divisors is an integer number (37240981).

Almost surely, 2^74481961 is an apocalyptic number.

It is an amenable number.

74481961 is a deficient number, since it is larger than the sum of its proper divisors (1).

74481961 is an equidigital number, since it uses as much as digits as its factorization.

74481961 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 48384, while the sum is 40.

The square root of 74481961 is about 8630.2932163398. The cubic root of 74481961 is about 420.7431306938.

It can be divided in two parts, 7448 and 1961, that added together give a square (9409 = 97²).

The spelling of 74481961 in words is "seventy-four million, four hundred eighty-one thousand, nine hundred sixty-one".