91400073 has 8 divisors (see below), whose sum is σ = 121912128. Its totient is φ = 60910704.

The previous prime is 91400047. The next prime is 91400087. The reversal of 91400073 is 37000419.

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

It is not a de Polignac number, because 91400073 - 2¹² = 91395977 is a prime.

It is not an unprimeable number, because it can be changed into a prime (91400033) 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, 9636 + ... + 16602.

It is an arithmetic number, because the mean of its divisors is an integer number (15239016).

Almost surely, 2^91400073 is an apocalyptic number.

It is an amenable number.

91400073 is a deficient number, since it is larger than the sum of its proper divisors (30512055).

91400073 is a wasteful number, since it uses less digits than its factorization.

91400073 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11343.

The product of its (nonzero) digits is 756, while the sum is 24.

The square root of 91400073 is about 9560.3385400309. The cubic root of 91400073 is about 450.4523402168.

The spelling of 91400073 in words is "ninety-one million, four hundred thousand, seventy-three".