99975479 has 2 divisors, whose sum is σ = 99975480. Its totient is φ = 99975478.

The previous prime is 99975467. The next prime is 99975481. The reversal of 99975479 is 97457999.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-99975479 is a prime.

Together with 99975481, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (99975679) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 49987739 + 49987740.

It is an arithmetic number, because the mean of its divisors is an integer number (49987740).

Almost surely, 2^99975479 is an apocalyptic number.

99975479 is a deficient number, since it is larger than the sum of its proper divisors (1).

99975479 is an equidigital number, since it uses as much as digits as its factorization.

99975479 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 6429780, while the sum is 59.

The square root of 99975479 is about 9998.7738748309. The cubic root of 99975479 is about 464.1209414599.

The spelling of 99975479 in words is "ninety-nine million, nine hundred seventy-five thousand, four hundred seventy-nine".