64779087 has 4 divisors (see below), whose sum is σ = 86372120. Its totient is φ = 43186056.

The previous prime is 64779067. The next prime is 64779097. The reversal of 64779087 is 78097746.

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

It is not a de Polignac number, because 64779087 - 2²⁴ = 48001871 is a prime.

It is a super-2 number, since 2×64779087² = 8392660225107138, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (64779067) 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, 10796512 + ... + 10796517.

It is an arithmetic number, because the mean of its divisors is an integer number (21593030).

Almost surely, 2^64779087 is an apocalyptic number.

64779087 is a deficient number, since it is larger than the sum of its proper divisors (21593033).

64779087 is a wasteful number, since it uses less digits than its factorization.

64779087 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21593032.

The product of its (nonzero) digits is 592704, while the sum is 48.

The square root of 64779087 is about 8048.5456450218. The cubic root of 64779087 is about 401.6165559826.

The spelling of 64779087 in words is "sixty-four million, seven hundred seventy-nine thousand, eighty-seven".