99825731 has 2 divisors, whose sum is σ = 99825732. Its totient is φ = 99825730.

The previous prime is 99825689. The next prime is 99825749. The reversal of 99825731 is 13752899.

It is a strong prime.

It is an emirp because it is prime and its reverse (13752899) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 99825731 - 2²⁶ = 32716867 is a prime.

It is a super-2 number, since 2×99825731² = 19930353139368722, which contains 22 as substring.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (99825431) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 49912865 + 49912866.

It is an arithmetic number, because the mean of its divisors is an integer number (49912866).

Almost surely, 2^99825731 is an apocalyptic number.

99825731 is a deficient number, since it is larger than the sum of its proper divisors (1).

99825731 is an equidigital number, since it uses as much as digits as its factorization.

99825731 is an evil number, because the sum of its binary digits is even.

The product of its digits is 136080, while the sum is 44.

The square root of 99825731 is about 9991.2827504780. The cubic root of 99825731 is about 463.8890982351.

The spelling of 99825731 in words is "ninety-nine million, eight hundred twenty-five thousand, seven hundred thirty-one".