101290091 has 16 divisors (see below), whose sum is σ = 122508288. Its totient is φ = 81866400.

The previous prime is 101290061. The next prime is 101290109. The reversal of 101290091 is 190092101.

It is not a de Polignac number, because 101290091 - 2⁶ = 101290027 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (23).

It is not an unprimeable number, because it can be changed into a prime (101290061) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 7001 + ... + 15861.

It is an arithmetic number, because the mean of its divisors is an integer number (7656768).

Almost surely, 2^101290091 is an apocalyptic number.

101290091 is a deficient number, since it is larger than the sum of its proper divisors (21218197).

101290091 is an equidigital number, since it uses as much as digits as its factorization.

101290091 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8962.

The product of its (nonzero) digits is 162, while the sum is 23.

The square root of 101290091 is about 10064.2978393925. The cubic root of 101290091 is about 466.1463848413.

The spelling of 101290091 in words is "one hundred one million, two hundred ninety thousand, ninety-one".