74978929 has 4 divisors (see below), whose sum is σ = 75072420. Its totient is φ = 74885440.

The previous prime is 74978903. The next prime is 74978977. The reversal of 74978929 is 92987947.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 41628304 + 33350625 = 6452^2 + 5775^2 .

It is a cyclic number.

It is not a de Polignac number, because 74978929 - 2¹³ = 74970737 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 74978929.

It is not an unprimeable number, because it can be changed into a prime (74978989) 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, 45532 + ... + 47149.

It is an arithmetic number, because the mean of its divisors is an integer number (18768105).

Almost surely, 2^74978929 is an apocalyptic number.

It is an amenable number.

74978929 is a deficient number, since it is larger than the sum of its proper divisors (93491).

74978929 is an equidigital number, since it uses as much as digits as its factorization.

74978929 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 93490.

The product of its digits is 2286144, while the sum is 55.

The square root of 74978929 is about 8659.0374176348. The cubic root of 74978929 is about 421.6768356858.

The spelling of 74978929 in words is "seventy-four million, nine hundred seventy-eight thousand, nine hundred twenty-nine".