97891471 has 2 divisors, whose sum is σ = 97891472. Its totient is φ = 97891470.

The previous prime is 97891441. The next prime is 97891513. The reversal of 97891471 is 17419879.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 97891471 - 2⁹ = 97890959 is a prime.

It is a super-3 number, since 3×97891471³ (a number of 25 digits) contains 333 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (97891421) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 48945735 + 48945736.

It is an arithmetic number, because the mean of its divisors is an integer number (48945736).

Almost surely, 2^97891471 is an apocalyptic number.

97891471 is a deficient number, since it is larger than the sum of its proper divisors (1).

97891471 is an equidigital number, since it uses as much as digits as its factorization.

97891471 is an evil number, because the sum of its binary digits is even.

The product of its digits is 127008, while the sum is 46.

The square root of 97891471 is about 9894.0118758772. The cubic root of 97891471 is about 460.8733738105.

The spelling of 97891471 in words is "ninety-seven million, eight hundred ninety-one thousand, four hundred seventy-one".