74991946 has 8 divisors (see below), whose sum is σ = 112527684. Its totient is φ = 37482720.

The previous prime is 74991929. The next prime is 74991949. The reversal of 74991946 is 64919947.

It can be written as a sum of positive squares in 2 ways, for example, as 73770921 + 1221025 = 8589^2 + 1105^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a self number, because there is not a number n which added to its sum of digits gives 74991946.

It is not an unprimeable number, because it can be changed into a prime (74991949) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3606 + ... + 12766.

Almost surely, 2^74991946 is an apocalyptic number.

74991946 is a deficient number, since it is larger than the sum of its proper divisors (37535738).

74991946 is a wasteful number, since it uses less digits than its factorization.

74991946 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13256.

The product of its digits is 489888, while the sum is 49.

The square root of 74991946 is about 8659.7890274533. The cubic root of 74991946 is about 421.7012365401.

The spelling of 74991946 in words is "seventy-four million, nine hundred ninety-one thousand, nine hundred forty-six".