79471531 has 2 divisors, whose sum is σ = 79471532. Its totient is φ = 79471530.

The previous prime is 79471519. The next prime is 79471537. The reversal of 79471531 is 13517497.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 79471531 - 2¹⁵ = 79438763 is a prime.

It is a super-2 number, since 2×79471531² = 12631448478967922, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (79471537) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 39735765 + 39735766.

It is an arithmetic number, because the mean of its divisors is an integer number (39735766).

Almost surely, 2^79471531 is an apocalyptic number.

79471531 is a deficient number, since it is larger than the sum of its proper divisors (1).

79471531 is an equidigital number, since it uses as much as digits as its factorization.

79471531 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 26460, while the sum is 37.

The square root of 79471531 is about 8914.6806448689. The cubic root of 79471531 is about 429.9360478174.

The spelling of 79471531 in words is "seventy-nine million, four hundred seventy-one thousand, five hundred thirty-one".