99531919 has 2 divisors, whose sum is σ = 99531920. Its totient is φ = 99531918.

The previous prime is 99531893. The next prime is 99531941. The reversal of 99531919 is 91913599.

It is a strong prime.

It is an emirp because it is prime and its reverse (91913599) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 99531919 - 2¹³ = 99523727 is a prime.

It is a super-2 number, since 2×99531919² = 19813205799645122, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (99538919) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 49765959 + 49765960.

It is an arithmetic number, because the mean of its divisors is an integer number (49765960).

Almost surely, 2^99531919 is an apocalyptic number.

99531919 is a deficient number, since it is larger than the sum of its proper divisors (1).

99531919 is an equidigital number, since it uses as much as digits as its factorization.

99531919 is an evil number, because the sum of its binary digits is even.

The product of its digits is 98415, while the sum is 46.

The square root of 99531919 is about 9976.5684982363. The cubic root of 99531919 is about 463.4335372646.

The spelling of 99531919 in words is "ninety-nine million, five hundred thirty-one thousand, nine hundred nineteen".