99900947 has 2 divisors, whose sum is σ = 99900948. Its totient is φ = 99900946.

The previous prime is 99900929. The next prime is 99900949. The reversal of 99900947 is 74900999.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 99900947 - 2⁶ = 99900883 is a prime.

It is a super-2 number, since 2×99900947² = 19960398422993618, which contains 22 as substring.

Together with 99900949, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (99900949) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 49950473 + 49950474.

It is an arithmetic number, because the mean of its divisors is an integer number (49950474).

Almost surely, 2^99900947 is an apocalyptic number.

99900947 is a deficient number, since it is larger than the sum of its proper divisors (1).

99900947 is an equidigital number, since it uses as much as digits as its factorization.

99900947 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 183708, while the sum is 47.

The square root of 99900947 is about 9995.0461229551. The cubic root of 99900947 is about 464.0055782995.

The spelling of 99900947 in words is "ninety-nine million, nine hundred thousand, nine hundred forty-seven".