78531367 has 2 divisors, whose sum is σ = 78531368. Its totient is φ = 78531366.

The previous prime is 78531289. The next prime is 78531377. The reversal of 78531367 is 76313587.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 78531367 - 2¹⁵ = 78498599 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (78531377) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 39265683 + 39265684.

It is an arithmetic number, because the mean of its divisors is an integer number (39265684).

Almost surely, 2^78531367 is an apocalyptic number.

78531367 is a deficient number, since it is larger than the sum of its proper divisors (1).

78531367 is an equidigital number, since it uses as much as digits as its factorization.

78531367 is an evil number, because the sum of its binary digits is even.

The product of its digits is 105840, while the sum is 40.

The square root of 78531367 is about 8861.7925387587. The cubic root of 78531367 is about 428.2339082300.

The spelling of 78531367 in words is "seventy-eight million, five hundred thirty-one thousand, three hundred sixty-seven".