78757051 has 2 divisors, whose sum is σ = 78757052. Its totient is φ = 78757050.

The previous prime is 78756989. The next prime is 78757057. The reversal of 78757051 is 15075787.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 78757051 - 2¹⁷ = 78625979 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 78756995 and 78757013.

It is not a weakly prime, because it can be changed into another prime (78757057) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 39378525 + 39378526.

It is an arithmetic number, because the mean of its divisors is an integer number (39378526).

Almost surely, 2^78757051 is an apocalyptic number.

78757051 is a deficient number, since it is larger than the sum of its proper divisors (1).

78757051 is an equidigital number, since it uses as much as digits as its factorization.

78757051 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 68600, while the sum is 40.

The square root of 78757051 is about 8874.5169446004. The cubic root of 78757051 is about 428.6437364399.

The spelling of 78757051 in words is "seventy-eight million, seven hundred fifty-seven thousand, fifty-one".