91490073 has 32 divisors (see below), whose sum is σ = 136857600. Its totient is φ = 54026496.

The previous prime is 91490071. The next prime is 91490089. The reversal of 91490073 is 37009419.

It is not a de Polignac number, because 91490073 - 2¹ = 91490071 is a prime.

It is not an unprimeable number, because it can be changed into a prime (91490071) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 254668 + ... + 255026.

It is an arithmetic number, because the mean of its divisors is an integer number (4276800).

Almost surely, 2^91490073 is an apocalyptic number.

It is an amenable number.

91490073 is a deficient number, since it is larger than the sum of its proper divisors (45367527).

91490073 is a wasteful number, since it uses less digits than its factorization.

91490073 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 661.

The product of its (nonzero) digits is 6804, while the sum is 33.

The square root of 91490073 is about 9565.0443281775. The cubic root of 91490073 is about 450.6001424741.

The spelling of 91490073 in words is "ninety-one million, four hundred ninety thousand, seventy-three".