74400961 has 4 divisors (see below), whose sum is σ = 76801024. Its totient is φ = 72000900.

The previous prime is 74400913. The next prime is 74400973. The reversal of 74400961 is 16900447.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 16900447 = 3797 ⋅4451.

It is a cyclic number.

It is not a de Polignac number, because 74400961 - 2¹¹ = 74398913 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (31), and also a Moran number because the ratio is a prime number: 2400031 = 74400961 / (7 + 4 + 4 + 0 + 0 + 9 + 6 + 1).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (74400061) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1199985 + ... + 1200046.

It is an arithmetic number, because the mean of its divisors is an integer number (19200256).

Almost surely, 2^74400961 is an apocalyptic number.

It is an amenable number.

74400961 is a deficient number, since it is larger than the sum of its proper divisors (2400063).

74400961 is a wasteful number, since it uses less digits than its factorization.

74400961 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2400062.

The product of its (nonzero) digits is 6048, while the sum is 31.

The square root of 74400961 is about 8625.5991675941. The cubic root of 74400961 is about 420.5905543527.

The spelling of 74400961 in words is "seventy-four million, four hundred thousand, nine hundred sixty-one".