79621478 has 8 divisors (see below), whose sum is σ = 121973472. Its totient is φ = 38963656.

The previous prime is 79621471. The next prime is 79621511. The reversal of 79621478 is 87412697.

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

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (79621471) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 423425 + ... + 423612.

It is an arithmetic number, because the mean of its divisors is an integer number (15246684).

Almost surely, 2^79621478 is an apocalyptic number.

79621478 is a deficient number, since it is larger than the sum of its proper divisors (42351994).

79621478 is a wasteful number, since it uses less digits than its factorization.

79621478 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 847086.

The product of its digits is 169344, while the sum is 44.

The square root of 79621478 is about 8923.0867977399. The cubic root of 79621478 is about 430.2062792505.

The spelling of 79621478 in words is "seventy-nine million, six hundred twenty-one thousand, four hundred seventy-eight".