91144002 has 16 divisors (see below), whose sum is σ = 182885472. Its totient is φ = 30281760.

The previous prime is 91143973. The next prime is 91144033. The reversal of 91144002 is 20044119.

It is a self number, because there is not a number n which added to its sum of digits gives 91144002.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 22899 + ... + 26582.

It is an arithmetic number, because the mean of its divisors is an integer number (11430342).

Almost surely, 2^91144002 is an apocalyptic number.

91144002 is an abundant number, since it is smaller than the sum of its proper divisors (91741470).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

91144002 is a wasteful number, since it uses less digits than its factorization.

91144002 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 49793.

The product of its (nonzero) digits is 288, while the sum is 21.

The square root of 91144002 is about 9546.9367862158. The cubic root of 91144002 is about 450.0312768384.

The spelling of 91144002 in words is "ninety-one million, one hundred forty-four thousand, two".