78499633 has 2 divisors, whose sum is σ = 78499634. Its totient is φ = 78499632.

The previous prime is 78499627. The next prime is 78499637. The reversal of 78499633 is 33699487.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 58491904 + 20007729 = 7648^2 + 4473^2 .

It is a cyclic number.

It is not a de Polignac number, because 78499633 - 2⁹ = 78499121 is a prime.

It is a super-2 number, since 2×78499633² = 12324384762269378, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (78499637) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 39249816 + 39249817.

It is an arithmetic number, because the mean of its divisors is an integer number (39249817).

Almost surely, 2^78499633 is an apocalyptic number.

It is an amenable number.

78499633 is a deficient number, since it is larger than the sum of its proper divisors (1).

78499633 is an equidigital number, since it uses as much as digits as its factorization.

78499633 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 979776, while the sum is 49.

The square root of 78499633 is about 8860.0018623023. The cubic root of 78499633 is about 428.1762183062.

The spelling of 78499633 in words is "seventy-eight million, four hundred ninety-nine thousand, six hundred thirty-three".