91140001 has 4 divisors (see below), whose sum is σ = 91186992. Its totient is φ = 91093012.

The previous prime is 91139999. The next prime is 91140061. The reversal of 91140001 is 10004119.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 91140001 - 2¹ = 91139999 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (91140061) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 20455 + ... + 24508.

It is an arithmetic number, because the mean of its divisors is an integer number (22796748).

Almost surely, 2^91140001 is an apocalyptic number.

It is an amenable number.

91140001 is a deficient number, since it is larger than the sum of its proper divisors (46991).

91140001 is a wasteful number, since it uses less digits than its factorization.

91140001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 46990.

The product of its (nonzero) digits is 36, while the sum is 16.

The square root of 91140001 is about 9546.7272402641. The cubic root of 91140001 is about 450.0246916493.

The spelling of 91140001 in words is "ninety-one million, one hundred forty thousand, one".