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99921929 is a prime number
BaseRepresentation
bin1011111010010…
…11000000001001
320222000120010012
411331023000021
5201040000204
613525401305
72322215402
oct575130011
9228016105
1099921929
1151448908
1229569235
1317917103
14d3b09a9
158b8b76e
hex5f4b009

99921929 has 2 divisors, whose sum is σ = 99921930. Its totient is φ = 99921928.

The previous prime is 99921919. The next prime is 99921947. The reversal of 99921929 is 92912999.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 99900025 + 21904 = 9995^2 + 148^2 .

It is an emirp because it is prime and its reverse (92912999) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 99921929 - 28 = 99921673 is a prime.

It is not a weakly prime, because it can be changed into another prime (99921919) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 49960964 + 49960965.

It is an arithmetic number, because the mean of its divisors is an integer number (49960965).

Almost surely, 299921929 is an apocalyptic number.

It is an amenable number.

99921929 is a deficient number, since it is larger than the sum of its proper divisors (1).

99921929 is an equidigital number, since it uses as much as digits as its factorization.

99921929 is an evil number, because the sum of its binary digits is even.

The product of its digits is 236196, while the sum is 50.

The square root of 99921929 is about 9996.0956878173. The cubic root of 99921929 is about 464.0380607527.

The spelling of 99921929 in words is "ninety-nine million, nine hundred twenty-one thousand, nine hundred twenty-nine".