91919542 has 16 divisors (see below), whose sum is σ = 161984592. Its totient is φ = 38567520.

The previous prime is 91919501. The next prime is 91919563. The reversal of 91919542 is 24591919.

It is a junction number, because it is equal to n+sod(n) for n = 91919495 and 91919504.

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, 160413 + ... + 160984.

It is an arithmetic number, because the mean of its divisors is an integer number (10124037).

Almost surely, 2^91919542 is an apocalyptic number.

91919542 is a deficient number, since it is larger than the sum of its proper divisors (70065050).

91919542 is a wasteful number, since it uses less digits than its factorization.

91919542 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 321423.

The product of its digits is 29160, while the sum is 40.

The square root of 91919542 is about 9587.4679660482. The cubic root of 91919542 is about 451.3041051036.

The spelling of 91919542 in words is "ninety-one million, nine hundred nineteen thousand, five hundred forty-two".