91070877 has 4 divisors (see below), whose sum is σ = 121427840. Its totient is φ = 60713916.

The previous prime is 91070873. The next prime is 91070893. The reversal of 91070877 is 77807019.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 77807019 = 3 ⋅25935673.

It is not a de Polignac number, because 91070877 - 2² = 91070873 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 (91070873) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 15178477 + ... + 15178482.

It is an arithmetic number, because the mean of its divisors is an integer number (30356960).

Almost surely, 2^91070877 is an apocalyptic number.

It is an amenable number.

91070877 is a deficient number, since it is larger than the sum of its proper divisors (30356963).

91070877 is a wasteful number, since it uses less digits than its factorization.

91070877 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30356962.

The product of its (nonzero) digits is 24696, while the sum is 39.

The square root of 91070877 is about 9543.1062553028. The cubic root of 91070877 is about 449.9108909978.

The spelling of 91070877 in words is "ninety-one million, seventy thousand, eight hundred seventy-seven".