78972301 has 2 divisors, whose sum is σ = 78972302. Its totient is φ = 78972300.

The previous prime is 78972287. The next prime is 78972329. The reversal of 78972301 is 10327987.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 69056100 + 9916201 = 8310^2 + 3149^2 .

It is an emirp because it is prime and its reverse (10327987) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 78972301 - 2⁵ = 78972269 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (78972331) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 39486150 + 39486151.

It is an arithmetic number, because the mean of its divisors is an integer number (39486151).

Almost surely, 2^78972301 is an apocalyptic number.

It is an amenable number.

78972301 is a deficient number, since it is larger than the sum of its proper divisors (1).

78972301 is an equidigital number, since it uses as much as digits as its factorization.

78972301 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 21168, while the sum is 37.

The square root of 78972301 is about 8886.6360902200. The cubic root of 78972301 is about 429.0338883219.

The spelling of 78972301 in words is "seventy-eight million, nine hundred seventy-two thousand, three hundred one".