79309487 has 4 divisors (see below), whose sum is σ = 79659096. Its totient is φ = 78959880.

The previous prime is 79309481. The next prime is 79309493. The reversal of 79309487 is 78490397.

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

It is an interprime number because it is at equal distance from previous prime (79309481) and next prime (79309493).

It is a cyclic number.

It is not a de Polignac number, because 79309487 - 2⁸ = 79309231 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 (79309481) 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, 174464 + ... + 174917.

It is an arithmetic number, because the mean of its divisors is an integer number (19914774).

Almost surely, 2^79309487 is an apocalyptic number.

79309487 is a deficient number, since it is larger than the sum of its proper divisors (349609).

79309487 is a wasteful number, since it uses less digits than its factorization.

79309487 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 349608.

The product of its (nonzero) digits is 381024, while the sum is 47.

The square root of 79309487 is about 8905.5874034226. The cubic root of 79309487 is about 429.6436329882.

The spelling of 79309487 in words is "seventy-nine million, three hundred nine thousand, four hundred eighty-seven".