99971051 has 2 divisors, whose sum is σ = 99971052.
Its totient is φ = 99971050.
The previous prime is 99971023. The next prime is 99971057. The reversal of 99971051 is 15017999.
It is a happy number.
It is a strong prime.
It is a cyclic number.
It is not a de Polignac number, because 99971051 - 214 = 99954667 is a prime.
It is a super-2 number, since 2×999710512 = 19988422076089202, which contains 22 as substring.
It is not a weakly prime, because it can be changed into another prime (99971057) by changing a digit.
It is a polite number, since it can be written as a sum of consecutive naturals, namely, 49985525 + 49985526.
It is an arithmetic number, because the mean of its divisors is an integer number (49985526).
Almost surely, 299971051 is an apocalyptic number.
99971051 is a deficient number, since it is larger than the sum of its proper divisors (1).
99971051 is an equidigital number, since it uses as much as digits as its factorization.
99971051 is an evil number, because the sum of its binary digits is even.
The product of its (nonzero) digits is 25515, while the sum is 41.
The square root of 99971051 is about 9998.5524452293.
The cubic root of 99971051 is about 464.1140892535.
The spelling of 99971051 in words is "ninety-nine million, nine hundred seventy-one thousand, fifty-one".