91061455 has 4 divisors (see below), whose sum is σ = 109273752. Its totient is φ = 72849160.

The previous prime is 91061449. The next prime is 91061461. The reversal of 91061455 is 55416019.

It is a semiprime because it is the product of two primes.

It is an interprime number because it is at equal distance from previous prime (91061449) and next prime (91061461).

It is not a de Polignac number, because 91061455 - 2³ = 91061447 is a prime.

It is a Smith number, since the sum of its digits (31) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a congruent number.

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, 9106141 + ... + 9106150.

It is an arithmetic number, because the mean of its divisors is an integer number (27318438).

Almost surely, 2^91061455 is an apocalyptic number.

91061455 is a deficient number, since it is larger than the sum of its proper divisors (18212297).

91061455 is a wasteful number, since it uses less digits than its factorization.

91061455 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18212296.

The product of its (nonzero) digits is 5400, while the sum is 31.

The square root of 91061455 is about 9542.6125877560. The cubic root of 91061455 is about 449.8953748535.

The spelling of 91061455 in words is "ninety-one million, sixty-one thousand, four hundred fifty-five".