99931451 has 2 divisors, whose sum is σ = 99931452. Its totient is φ = 99931450.

The previous prime is 99931439. The next prime is 99931471. The reversal of 99931451 is 15413999.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-99931451 is a prime.

It is a Sophie Germain prime.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 99931399 and 99931408.

It is not a weakly prime, because it can be changed into another prime (99931411) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 49965725 + 49965726.

It is an arithmetic number, because the mean of its divisors is an integer number (49965726).

Almost surely, 2^99931451 is an apocalyptic number.

99931451 is a deficient number, since it is larger than the sum of its proper divisors (1).

99931451 is an equidigital number, since it uses as much as digits as its factorization.

99931451 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 43740, while the sum is 41.

The square root of 99931451 is about 9996.5719624279. The cubic root of 99931451 is about 464.0528003603.

The spelling of 99931451 in words is "ninety-nine million, nine hundred thirty-one thousand, four hundred fifty-one".