78980927 has 4 divisors (see below), whose sum is σ = 79055880. Its totient is φ = 78905976.

The previous prime is 78980899. The next prime is 78980933. The reversal of 78980927 is 72908987.

It is a happy number.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-78980927 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 (78980327) 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, 35873 + ... + 38010.

It is an arithmetic number, because the mean of its divisors is an integer number (19763970).

Almost surely, 2^78980927 is an apocalyptic number.

78980927 is a deficient number, since it is larger than the sum of its proper divisors (74953).

78980927 is a wasteful number, since it uses less digits than its factorization.

78980927 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 74952.

The product of its (nonzero) digits is 508032, while the sum is 50.

The square root of 78980927 is about 8887.1214124710. The cubic root of 78980927 is about 429.0495086155.

The spelling of 78980927 in words is "seventy-eight million, nine hundred eighty thousand, nine hundred twenty-seven".