76988021 has 8 divisors (see below), whose sum is σ = 85774464. Its totient is φ = 68499520.

The previous prime is 76987993. The next prime is 76988029. The reversal of 76988021 is 12088967.

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

It is a cyclic number.

It is not a de Polignac number, because 76988021 - 2²⁶ = 9879157 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 76988021.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (76988029) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 73940 + ... + 74973.

It is an arithmetic number, because the mean of its divisors is an integer number (10721808).

Almost surely, 2^76988021 is an apocalyptic number.

It is an amenable number.

76988021 is a deficient number, since it is larger than the sum of its proper divisors (8786443).

76988021 is a wasteful number, since it uses less digits than its factorization.

76988021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 148971.

The product of its (nonzero) digits is 48384, while the sum is 41.

The square root of 76988021 is about 8774.2817939704. The cubic root of 76988021 is about 425.4100236749.

The spelling of 76988021 in words is "seventy-six million, nine hundred eighty-eight thousand, twenty-one".