76642079 has 4 divisors (see below), whose sum is σ = 78511440. Its totient is φ = 74772720.

The previous prime is 76642063. The next prime is 76642091. The reversal of 76642079 is 97024667.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 97024667 = 197 ⋅492511.

It is a cyclic number.

It is not a de Polignac number, because 76642079 - 2⁴ = 76642063 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (41), and also a Moran number because the ratio is a prime number: 1869319 = 76642079 / (7 + 6 + 6 + 4 + 2 + 0 + 7 + 9).

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (76642019) 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, 934619 + ... + 934700.

It is an arithmetic number, because the mean of its divisors is an integer number (19627860).

Almost surely, 2^76642079 is an apocalyptic number.

76642079 is a deficient number, since it is larger than the sum of its proper divisors (1869361).

76642079 is a wasteful number, since it uses less digits than its factorization.

76642079 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1869360.

The product of its (nonzero) digits is 127008, while the sum is 41.

The square root of 76642079 is about 8754.5461904087. The cubic root of 76642079 is about 424.7718803464.

The spelling of 76642079 in words is "seventy-six million, six hundred forty-two thousand, seventy-nine".