91671506 has 8 divisors (see below), whose sum is σ = 137645004. Its totient is φ = 45789840.

The previous prime is 91671493. The next prime is 91671511. The reversal of 91671506 is 60517619.

It can be written as a sum of positive squares in 2 ways, for example, as 91374481 + 297025 = 9559^2 + 545^2 .

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

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 20405 + ... + 24488.

Almost surely, 2^91671506 is an apocalyptic number.

91671506 is a deficient number, since it is larger than the sum of its proper divisors (45973498).

91671506 is a wasteful number, since it uses less digits than its factorization.

91671506 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 45916.

The product of its (nonzero) digits is 11340, while the sum is 35.

The square root of 91671506 is about 9574.5238001689. The cubic root of 91671506 is about 450.8978059283.

The spelling of 91671506 in words is "ninety-one million, six hundred seventy-one thousand, five hundred six".