91361870 has 16 divisors (see below), whose sum is σ = 166907088. Its totient is φ = 35999040.

The previous prime is 91361869. The next prime is 91361891. The reversal of 91361870 is 7816319.

It is a self number, because there is not a number n which added to its sum of digits gives 91361870.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 67511 + ... + 68850.

It is an arithmetic number, because the mean of its divisors is an integer number (10431693).

Almost surely, 2^91361870 is an apocalyptic number.

91361870 is a deficient number, since it is larger than the sum of its proper divisors (75545218).

91361870 is a wasteful number, since it uses less digits than its factorization.

91361870 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 136435.

The product of its (nonzero) digits is 9072, while the sum is 35.

The square root of 91361870 is about 9558.3403371087. The cubic root of 91361870 is about 450.3895721090.

The spelling of 91361870 in words is "ninety-one million, three hundred sixty-one thousand, eight hundred seventy".