91540451 has 8 divisors (see below), whose sum is σ = 93100224. Its totient is φ = 89991720.

The previous prime is 91540439. The next prime is 91540469. The reversal of 91540451 is 15404519.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 91540451 - 2⁶ = 91540387 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (91540411) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 14900 + ... + 20126.

It is an arithmetic number, because the mean of its divisors is an integer number (11637528).

Almost surely, 2^91540451 is an apocalyptic number.

91540451 is a deficient number, since it is larger than the sum of its proper divisors (1559773).

91540451 is a wasteful number, since it uses less digits than its factorization.

91540451 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5521.

The product of its (nonzero) digits is 3600, while the sum is 29.

The square root of 91540451 is about 9567.6774088595. The cubic root of 91540451 is about 450.6828332985.

The spelling of 91540451 in words is "ninety-one million, five hundred forty thousand, four hundred fifty-one".