79905953 has 2 divisors, whose sum is σ = 79905954. Its totient is φ = 79905952.

The previous prime is 79905949. The next prime is 79905971. The reversal of 79905953 is 35950997.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 55472704 + 24433249 = 7448^2 + 4943^2 .

It is a cyclic number.

It is not a de Polignac number, because 79905953 - 2² = 79905949 is a prime.

It is a super-2 number, since 2×79905953² = 12769922649676418, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 79905898 and 79905907.

It is not a weakly prime, because it can be changed into another prime (79905923) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 39952976 + 39952977.

It is an arithmetic number, because the mean of its divisors is an integer number (39952977).

Almost surely, 2^79905953 is an apocalyptic number.

It is an amenable number.

79905953 is a deficient number, since it is larger than the sum of its proper divisors (1).

79905953 is an equidigital number, since it uses as much as digits as its factorization.

79905953 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 382725, while the sum is 47.

The square root of 79905953 is about 8939.0129768336. The cubic root of 79905953 is about 430.7180233650.

The spelling of 79905953 in words is "seventy-nine million, nine hundred five thousand, nine hundred fifty-three".