91719742 has 4 divisors (see below), whose sum is σ = 137579616. Its totient is φ = 45859870.

The previous prime is 91719713. The next prime is 91719757. The reversal of 91719742 is 24791719.

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

It is a super-2 number, since 2×91719742² = 16825022145093128, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 91719695 and 91719704.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 22929934 + ... + 22929937.

It is an arithmetic number, because the mean of its divisors is an integer number (34394904).

Almost surely, 2^91719742 is an apocalyptic number.

91719742 is a deficient number, since it is larger than the sum of its proper divisors (45859874).

91719742 is a wasteful number, since it uses less digits than its factorization.

91719742 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 45859873.

The product of its digits is 31752, while the sum is 40.

The square root of 91719742 is about 9577.0424453481. The cubic root of 91719742 is about 450.9768770009.

The spelling of 91719742 in words is "ninety-one million, seven hundred nineteen thousand, seven hundred forty-two".