91403671 has 4 divisors (see below), whose sum is σ = 91429344. Its totient is φ = 91378000.

The previous prime is 91403657. The next prime is 91403701. The reversal of 91403671 is 17630419.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 91403671 - 2⁵ = 91403639 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (91403971) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6430 + ... + 14971.

It is an arithmetic number, because the mean of its divisors is an integer number (22857336).

Almost surely, 2^91403671 is an apocalyptic number.

91403671 is a deficient number, since it is larger than the sum of its proper divisors (25673).

91403671 is a wasteful number, since it uses less digits than its factorization.

91403671 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25672.

The product of its (nonzero) digits is 4536, while the sum is 31.

The square root of 91403671 is about 9560.5267114318. The cubic root of 91403671 is about 450.4582508840.

The spelling of 91403671 in words is "ninety-one million, four hundred three thousand, six hundred seventy-one".