78137663 has 2 divisors, whose sum is σ = 78137664. Its totient is φ = 78137662.

The previous prime is 78137651. The next prime is 78137707. The reversal of 78137663 is 36673187.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 78137663 - 2¹⁴ = 78121279 is a prime.

It is a super-2 number, since 2×78137663² = 12210988758203138, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 78137663.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (78137363) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 39068831 + 39068832.

It is an arithmetic number, because the mean of its divisors is an integer number (39068832).

Almost surely, 2^78137663 is an apocalyptic number.

78137663 is a deficient number, since it is larger than the sum of its proper divisors (1).

78137663 is an equidigital number, since it uses as much as digits as its factorization.

78137663 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 127008, while the sum is 41.

The square root of 78137663 is about 8839.5510632611. The cubic root of 78137663 is about 427.5170824085.

The spelling of 78137663 in words is "seventy-eight million, one hundred thirty-seven thousand, six hundred sixty-three".