79153993 has 2 divisors, whose sum is σ = 79153994. Its totient is φ = 79153992.

The previous prime is 79153961. The next prime is 79154011. The reversal of 79153993 is 39935197.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 65076489 + 14077504 = 8067^2 + 3752^2 .

It is an emirp because it is prime and its reverse (39935197) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 79153993 - 2⁵ = 79153961 is a prime.

It is not a weakly prime, because it can be changed into another prime (79153933) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 39576996 + 39576997.

It is an arithmetic number, because the mean of its divisors is an integer number (39576997).

Almost surely, 2^79153993 is an apocalyptic number.

It is an amenable number.

79153993 is a deficient number, since it is larger than the sum of its proper divisors (1).

79153993 is an equidigital number, since it uses as much as digits as its factorization.

79153993 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 229635, while the sum is 46.

The square root of 79153993 is about 8896.8529829373. The cubic root of 79153993 is about 429.3626631750.

Subtracting from 79153993 its reverse (39935197), we obtain a triangular number (39218796 = T₈₈₅₆).

The spelling of 79153993 in words is "seventy-nine million, one hundred fifty-three thousand, nine hundred ninety-three".