74071961 has 4 divisors (see below), whose sum is σ = 74159652. Its totient is φ = 73984272.

The previous prime is 74071951. The next prime is 74071973. The reversal of 74071961 is 16917047.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 16917047 = 7 ⋅2416721.

It can be written as a sum of positive squares in 2 ways, for example, as 28090000 + 45981961 = 5300^2 + 6781^2 .

It is a cyclic number.

It is not a de Polignac number, because 74071961 - 2¹⁴ = 74055577 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (74071951) 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, 42566 + ... + 44271.

It is an arithmetic number, because the mean of its divisors is an integer number (18539913).

Almost surely, 2^74071961 is an apocalyptic number.

It is an amenable number.

74071961 is a deficient number, since it is larger than the sum of its proper divisors (87691).

74071961 is an equidigital number, since it uses as much as digits as its factorization.

74071961 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 87690.

The product of its (nonzero) digits is 10584, while the sum is 35.

The square root of 74071961 is about 8606.5068988528. The cubic root of 74071961 is about 419.9696898006.

The spelling of 74071961 in words is "seventy-four million, seventy-one thousand, nine hundred sixty-one".