91149477 has 4 divisors (see below), whose sum is σ = 121532640. Its totient is φ = 60766316.

The previous prime is 91149473. The next prime is 91149493. The reversal of 91149477 is 77494119.

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.

It is a cyclic number.

It is not a de Polignac number, because 91149477 - 2² = 91149473 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (91149473) 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, 15191577 + ... + 15191582.

It is an arithmetic number, because the mean of its divisors is an integer number (30383160).

Almost surely, 2^91149477 is an apocalyptic number.

It is an amenable number.

91149477 is a deficient number, since it is larger than the sum of its proper divisors (30383163).

91149477 is a wasteful number, since it uses less digits than its factorization.

91149477 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30383162.

The product of its digits is 63504, while the sum is 42.

The square root of 91149477 is about 9547.2235230982. The cubic root of 91149477 is about 450.0402877510.

The spelling of 91149477 in words is "ninety-one million, one hundred forty-nine thousand, four hundred seventy-seven".