91506461 has 8 divisors (see below), whose sum is σ = 98718264. Its totient is φ = 84497920.

The previous prime is 91506431. The next prime is 91506469. The reversal of 91506461 is 16460519.

It can be written as a sum of positive squares in 4 ways, for example, as 10686361 + 80820100 = 3269^2 + 8990^2 .

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 91506461 - 2²² = 87312157 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 (91506469) 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, 49880 + ... + 51681.

It is an arithmetic number, because the mean of its divisors is an integer number (12339783).

Almost surely, 2^91506461 is an apocalyptic number.

It is an amenable number.

91506461 is a deficient number, since it is larger than the sum of its proper divisors (7211803).

91506461 is a wasteful number, since it uses less digits than its factorization.

91506461 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 101631.

The product of its (nonzero) digits is 6480, while the sum is 32.

The square root of 91506461 is about 9565.9009507730. The cubic root of 91506461 is about 450.6270451898.

The spelling of 91506461 in words is "ninety-one million, five hundred six thousand, four hundred sixty-one".