79898531 has 2 divisors, whose sum is σ = 79898532. Its totient is φ = 79898530.

The previous prime is 79898461. The next prime is 79898561. The reversal of 79898531 is 13589897.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 79898531 - 2¹⁴ = 79882147 is a prime.

It is a super-2 number, since 2×79898531² = 12767550511915922, 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 79898531.

It is not a weakly prime, because it can be changed into another prime (79898561) 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, 39949265 + 39949266.

It is an arithmetic number, because the mean of its divisors is an integer number (39949266).

Almost surely, 2^79898531 is an apocalyptic number.

79898531 is a deficient number, since it is larger than the sum of its proper divisors (1).

79898531 is an equidigital number, since it uses as much as digits as its factorization.

79898531 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 544320, while the sum is 50.

The square root of 79898531 is about 8938.5978206875. The cubic root of 79898531 is about 430.7046873200.

The spelling of 79898531 in words is "seventy-nine million, eight hundred ninety-eight thousand, five hundred thirty-one".