91471069 has 4 divisors (see below), whose sum is σ = 95448096. Its totient is φ = 87494044.

The previous prime is 91471027. The next prime is 91471087. The reversal of 91471069 is 96017419.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 91471069 - 2⁷ = 91470941 is a prime.

It is a super-2 number, since 2×91471069² = 16733912928005522, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (91471469) 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, 1988479 + ... + 1988524.

It is an arithmetic number, because the mean of its divisors is an integer number (23862024).

Almost surely, 2^91471069 is an apocalyptic number.

It is an amenable number.

91471069 is a deficient number, since it is larger than the sum of its proper divisors (3977027).

91471069 is a wasteful number, since it uses less digits than its factorization.

91471069 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3977026.

The product of its (nonzero) digits is 13608, while the sum is 37.

The square root of 91471069 is about 9564.0508677025. The cubic root of 91471069 is about 450.5689412818.

The spelling of 91471069 in words is "ninety-one million, four hundred seventy-one thousand, sixty-nine".