91402471 has 2 divisors, whose sum is σ = 91402472. Its totient is φ = 91402470.

The previous prime is 91402439. The next prime is 91402511. The reversal of 91402471 is 17420419.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 91402471 - 2⁵ = 91402439 is a prime.

It is a super-3 number, since 3×91402471³ (a number of 25 digits) contains 333 as substring.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (91402771) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 45701235 + 45701236.

It is an arithmetic number, because the mean of its divisors is an integer number (45701236).

Almost surely, 2^91402471 is an apocalyptic number.

91402471 is a deficient number, since it is larger than the sum of its proper divisors (1).

91402471 is an equidigital number, since it uses as much as digits as its factorization.

91402471 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2016, while the sum is 28.

The square root of 91402471 is about 9560.4639531772. The cubic root of 91402471 is about 450.4562795837.

It can be divided in two parts, 9140 and 2471, that added together give a palindrome (11611).

The spelling of 91402471 in words is "ninety-one million, four hundred two thousand, four hundred seventy-one".