97861187 has 2 divisors, whose sum is σ = 97861188. Its totient is φ = 97861186.

The previous prime is 97861157. The next prime is 97861193. The reversal of 97861187 is 78116879.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 97861187 - 2⁶ = 97861123 is a prime.

It is not a weakly prime, because it can be changed into another prime (97861157) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 48930593 + 48930594.

It is an arithmetic number, because the mean of its divisors is an integer number (48930594).

Almost surely, 2^97861187 is an apocalyptic number.

97861187 is a deficient number, since it is larger than the sum of its proper divisors (1).

97861187 is an equidigital number, since it uses as much as digits as its factorization.

97861187 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 169344, while the sum is 47.

The square root of 97861187 is about 9892.4813368538. The cubic root of 97861187 is about 460.8258431842.

The spelling of 97861187 in words is "ninety-seven million, eight hundred sixty-one thousand, one hundred eighty-seven".