78875437 has 2 divisors, whose sum is σ = 78875438. Its totient is φ = 78875436.

The previous prime is 78875413. The next prime is 78875483. The reversal of 78875437 is 73457887.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 61058596 + 17816841 = 7814^2 + 4221^2 .

It is a cyclic number.

It is not a de Polignac number, because 78875437 - 2⁷ = 78875309 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (78875837) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 39437718 + 39437719.

It is an arithmetic number, because the mean of its divisors is an integer number (39437719).

Almost surely, 2^78875437 is an apocalyptic number.

It is an amenable number.

78875437 is a deficient number, since it is larger than the sum of its proper divisors (1).

78875437 is an equidigital number, since it uses as much as digits as its factorization.

78875437 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1317120, while the sum is 49.

The square root of 78875437 is about 8881.1844367742. The cubic root of 78875437 is about 428.8584051011.

The spelling of 78875437 in words is "seventy-eight million, eight hundred seventy-five thousand, four hundred thirty-seven".