91473619 has 8 divisors (see below), whose sum is σ = 97282640. Its totient is φ = 85764096.

The previous prime is 91473607. The next prime is 91473637. The reversal of 91473619 is 91637419.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 91473619 - 2⁷ = 91473491 is a prime.

It is a super-2 number, since 2×91473619² = 16734845945914322, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (91443619) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 22974 + ... + 26659.

It is an arithmetic number, because the mean of its divisors is an integer number (12160330).

Almost surely, 2^91473619 is an apocalyptic number.

91473619 is a deficient number, since it is larger than the sum of its proper divisors (5809021).

91473619 is a wasteful number, since it uses less digits than its factorization.

91473619 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 49749.

The product of its digits is 40824, while the sum is 40.

The square root of 91473619 is about 9564.1841784859. The cubic root of 91473619 is about 450.5731281799.

The spelling of 91473619 in words is "ninety-one million, four hundred seventy-three thousand, six hundred nineteen".