290000000091 has 16 divisors (see below), whose sum is σ = 387957063200. Its totient is φ = 192688657920.

The previous prime is 290000000077. The next prime is 290000000099. The reversal of 290000000091 is 190000000092.

It is a happy number.

It is not a de Polignac number, because 290000000091 - 2¹³ = 289999991899 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 289999999995 and 290000000067.

It is not an unprimeable number, because it can be changed into a prime (290000000099) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2198481 + ... + 2326653.

It is an arithmetic number, because the mean of its divisors is an integer number (24247316450).

Almost surely, 2^290000000091 is an apocalyptic number.

290000000091 is a deficient number, since it is larger than the sum of its proper divisors (97957063109).

290000000091 is a wasteful number, since it uses less digits than its factorization.

290000000091 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 130686.

The product of its (nonzero) digits is 162, while the sum is 21.

Subtracting from 290000000091 its reverse (190000000092), we obtain a palindrome (99999999999).

The spelling of 290000000091 in words is "two hundred ninety billion, ninety-one", and thus it is an aban number.