97899251 has 2 divisors, whose sum is σ = 97899252. Its totient is φ = 97899250.

The previous prime is 97899239. The next prime is 97899253. The reversal of 97899251 is 15299879.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 97899251 - 2¹⁸ = 97637107 is a prime.

It is a super-2 number, since 2×97899251² = 19168526692722002, which contains 22 as substring.

Together with 97899253, it forms a pair of twin primes.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 97899251.

It is not a weakly prime, because it can be changed into another prime (97899253) 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, 48949625 + 48949626.

It is an arithmetic number, because the mean of its divisors is an integer number (48949626).

Almost surely, 2^97899251 is an apocalyptic number.

97899251 is a deficient number, since it is larger than the sum of its proper divisors (1).

97899251 is an equidigital number, since it uses as much as digits as its factorization.

97899251 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 408240, while the sum is 50.

The square root of 97899251 is about 9894.4050351701. The cubic root of 97899251 is about 460.8855829091.

The spelling of 97899251 in words is "ninety-seven million, eight hundred ninety-nine thousand, two hundred fifty-one".