78763971 has 48 divisors (see below), whose sum is σ = 128597760. Its totient is φ = 42456960.

The previous prime is 78763961. The next prime is 78763973. The reversal of 78763971 is 17936787.

It is a happy number.

It is not a de Polignac number, because 78763971 - 2⁵ = 78763939 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 78763971.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (78763973) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 161490 + ... + 161976.

It is an arithmetic number, because the mean of its divisors is an integer number (2679120).

Almost surely, 2^78763971 is an apocalyptic number.

78763971 is a deficient number, since it is larger than the sum of its proper divisors (49833789).

78763971 is a wasteful number, since it uses less digits than its factorization.

78763971 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 556 (or 543 counting only the distinct ones).

The product of its digits is 444528, while the sum is 48.

The square root of 78763971 is about 8874.9068164122. The cubic root of 78763971 is about 428.6562903541.

The spelling of 78763971 in words is "seventy-eight million, seven hundred sixty-three thousand, nine hundred seventy-one".