91452047 has 4 divisors (see below), whose sum is σ = 92740176. Its totient is φ = 90163920.

The previous prime is 91452037. The next prime is 91452079. The reversal of 91452047 is 74025419.

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 91452047 - 2²² = 87257743 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 (91452007) 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, 643958 + ... + 644099.

It is an arithmetic number, because the mean of its divisors is an integer number (23185044).

Almost surely, 2^91452047 is an apocalyptic number.

91452047 is a deficient number, since it is larger than the sum of its proper divisors (1288129).

91452047 is a wasteful number, since it uses less digits than its factorization.

91452047 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1288128.

The product of its (nonzero) digits is 10080, while the sum is 32.

The square root of 91452047 is about 9563.0563628999. The cubic root of 91452047 is about 450.5377062087.

The spelling of 91452047 in words is "ninety-one million, four hundred fifty-two thousand, forty-seven".