78713501 has 2 divisors, whose sum is σ = 78713502. Its totient is φ = 78713500.

The previous prime is 78713489. The next prime is 78713507. The reversal of 78713501 is 10531787.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 74407876 + 4305625 = 8626^2 + 2075^2 .

It is a cyclic number.

It is not a de Polignac number, because 78713501 - 2¹⁴ = 78697117 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (78713507) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 39356750 + 39356751.

It is an arithmetic number, because the mean of its divisors is an integer number (39356751).

Almost surely, 2^78713501 is an apocalyptic number.

It is an amenable number.

78713501 is a deficient number, since it is larger than the sum of its proper divisors (1).

78713501 is an equidigital number, since it uses as much as digits as its factorization.

78713501 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 5880, while the sum is 32.

The square root of 78713501 is about 8872.0629506333. The cubic root of 78713501 is about 428.5647133498.

The spelling of 78713501 in words is "seventy-eight million, seven hundred thirteen thousand, five hundred one".