78751459 has 2 divisors, whose sum is σ = 78751460. Its totient is φ = 78751458.

The previous prime is 78751433. The next prime is 78751493. The reversal of 78751459 is 95415787.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 78751459 - 2¹³ = 78743267 is a prime.

It is not a weakly prime, because it can be changed into another prime (78751759) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 39375729 + 39375730.

It is an arithmetic number, because the mean of its divisors is an integer number (39375730).

Almost surely, 2^78751459 is an apocalyptic number.

78751459 is a deficient number, since it is larger than the sum of its proper divisors (1).

78751459 is an equidigital number, since it uses as much as digits as its factorization.

78751459 is an evil number, because the sum of its binary digits is even.

The product of its digits is 352800, while the sum is 46.

The square root of 78751459 is about 8874.2018796058. The cubic root of 78751459 is about 428.6335911789.

The spelling of 78751459 in words is "seventy-eight million, seven hundred fifty-one thousand, four hundred fifty-nine".