64121079 has 16 divisors (see below), whose sum is σ = 97323264. Its totient is φ = 37171200.

The previous prime is 64121063. The next prime is 64121081. The reversal of 64121079 is 97012146.

It is a happy number.

It is not a de Polignac number, because 64121079 - 2⁴ = 64121063 is a prime.

It is a super-2 number, since 2×64121079² = 8223025544248482, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (64121779) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 41482 + ... + 42999.

It is an arithmetic number, because the mean of its divisors is an integer number (6082704).

Almost surely, 2^64121079 is an apocalyptic number.

64121079 is a gapful number since it is divisible by the number (69) formed by its first and last digit.

64121079 is a deficient number, since it is larger than the sum of its proper divisors (33202185).

64121079 is a wasteful number, since it uses less digits than its factorization.

64121079 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 84518.

The product of its (nonzero) digits is 3024, while the sum is 30.

The square root of 64121079 is about 8007.5638617497. The cubic root of 64121079 is about 400.2520890111.

The spelling of 64121079 in words is "sixty-four million, one hundred twenty-one thousand, seventy-nine".