290388750091 has 4 divisors (see below), whose sum is σ = 316787727384. Its totient is φ = 263989772800.

The previous prime is 290388750079. The next prime is 290388750131. The reversal of 290388750091 is 190057883092.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 290388750091 - 2²⁷ = 290254532363 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (290388750391) 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, 13199488630 + ... + 13199488651.

It is an arithmetic number, because the mean of its divisors is an integer number (79196931846).

Almost surely, 2^290388750091 is an apocalyptic number.

290388750091 is a deficient number, since it is larger than the sum of its proper divisors (26398977293).

290388750091 is a wasteful number, since it uses less digits than its factorization.

290388750091 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26398977292.

The product of its (nonzero) digits is 1088640, while the sum is 52.

The spelling of 290388750091 in words is "two hundred ninety billion, three hundred eighty-eight million, seven hundred fifty thousand, ninety-one".