78232559 has 2 divisors, whose sum is σ = 78232560. Its totient is φ = 78232558.

The previous prime is 78232549. The next prime is 78232571. The reversal of 78232559 is 95523287.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 78232559 - 2⁴ = 78232543 is a prime.

It is a super-2 number, since 2×78232559² = 12240666575376962, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (78232549) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 39116279 + 39116280.

It is an arithmetic number, because the mean of its divisors is an integer number (39116280).

Almost surely, 2^78232559 is an apocalyptic number.

78232559 is a deficient number, since it is larger than the sum of its proper divisors (1).

78232559 is an equidigital number, since it uses as much as digits as its factorization.

78232559 is an evil number, because the sum of its binary digits is even.

The product of its digits is 151200, while the sum is 41.

The square root of 78232559 is about 8844.9171279329. The cubic root of 78232559 is about 427.6900815615.

The spelling of 78232559 in words is "seventy-eight million, two hundred thirty-two thousand, five hundred fifty-nine".