78974629 has 4 divisors (see below), whose sum is σ = 79104076. Its totient is φ = 78845184.

The previous prime is 78974593. The next prime is 78974633. The reversal of 78974629 is 92647987.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 92647987 = 41 ⋅2259707.

It can be written as a sum of positive squares in 2 ways, for example, as 11356900 + 67617729 = 3370^2 + 8223^2 .

It is a cyclic number.

It is not a de Polignac number, because 78974629 - 2⁷ = 78974501 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (78974669) 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, 63804 + ... + 65029.

It is an arithmetic number, because the mean of its divisors is an integer number (19776019).

Almost surely, 2^78974629 is an apocalyptic number.

It is an amenable number.

78974629 is a deficient number, since it is larger than the sum of its proper divisors (129447).

78974629 is a wasteful number, since it uses less digits than its factorization.

78974629 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 129446.

The product of its digits is 1524096, while the sum is 52.

The square root of 78974629 is about 8886.7670724510. The cubic root of 78974629 is about 429.0381040662.

The spelling of 78974629 in words is "seventy-eight million, nine hundred seventy-four thousand, six hundred twenty-nine".