74950921 has 4 divisors (see below), whose sum is σ = 74968272. Its totient is φ = 74933572.

The previous prime is 74950879. The next prime is 74950927. The reversal of 74950921 is 12905947.

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 a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 12905947 = 97 ⋅133051.

It is a cyclic number.

It is not a de Polignac number, because 74950921 - 2⁷ = 74950793 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (74950927) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3510 + ... + 12736.

It is an arithmetic number, because the mean of its divisors is an integer number (18742068).

Almost surely, 2^74950921 is an apocalyptic number.

It is an amenable number.

74950921 is a deficient number, since it is larger than the sum of its proper divisors (17351).

74950921 is an equidigital number, since it uses as much as digits as its factorization.

74950921 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17350.

The product of its (nonzero) digits is 22680, while the sum is 37.

The square root of 74950921 is about 8657.4199967427. The cubic root of 74950921 is about 421.6243240632.

The spelling of 74950921 in words is "seventy-four million, nine hundred fifty thousand, nine hundred twenty-one".