78958751 has 2 divisors, whose sum is σ = 78958752. Its totient is φ = 78958750.

The previous prime is 78958741. The next prime is 78958783. The reversal of 78958751 is 15785987.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 78958751 - 2¹⁰ = 78957727 is a prime.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 78958751.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (78958741) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 39479375 + 39479376.

It is an arithmetic number, because the mean of its divisors is an integer number (39479376).

Almost surely, 2^78958751 is an apocalyptic number.

78958751 is a deficient number, since it is larger than the sum of its proper divisors (1).

78958751 is an equidigital number, since it uses as much as digits as its factorization.

78958751 is an evil number, because the sum of its binary digits is even.

The product of its digits is 705600, while the sum is 50.

The square root of 78958751 is about 8885.8736767973. The cubic root of 78958751 is about 429.0093491622.

The spelling of 78958751 in words is "seventy-eight million, nine hundred fifty-eight thousand, seven hundred fifty-one".