290015641 has 4 divisors (see below), whose sum is σ = 293988532. Its totient is φ = 286042752.

The previous prime is 290015569. The next prime is 290015651. The reversal of 290015641 is 146510092.

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

It can be written as a sum of positive squares in 2 ways, for example, as 174345616 + 115670025 = 13204^2 + 10755^2 .

It is a cyclic number.

It is not a de Polignac number, because 290015641 - 2⁹ = 290015129 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (290015651) 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, 1986336 + ... + 1986481.

It is an arithmetic number, because the mean of its divisors is an integer number (73497133).

Almost surely, 2^290015641 is an apocalyptic number.

It is an amenable number.

290015641 is a deficient number, since it is larger than the sum of its proper divisors (3972891).

290015641 is an equidigital number, since it uses as much as digits as its factorization.

290015641 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3972890.

The product of its (nonzero) digits is 2160, while the sum is 28.

The square root of 290015641 is about 17029.8455953071. The cubic root of 290015641 is about 661.9224945239.

The spelling of 290015641 in words is "two hundred ninety million, fifteen thousand, six hundred forty-one".