290644961 has 8 divisors (see below), whose sum is σ = 297068544. Its totient is φ = 284286240.

The previous prime is 290644877. The next prime is 290644967. The reversal of 290644961 is 169446092.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 290644961 - 2¹⁸ = 290382817 is a prime.

It is not an unprimeable number, because it can be changed into a prime (290644967) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7100 + ... + 25133.

It is an arithmetic number, because the mean of its divisors is an integer number (37133568).

Almost surely, 2^290644961 is an apocalyptic number.

It is an amenable number.

290644961 is a deficient number, since it is larger than the sum of its proper divisors (6423583).

290644961 is a wasteful number, since it uses less digits than its factorization.

290644961 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 32431.

The product of its (nonzero) digits is 93312, while the sum is 41.

The square root of 290644961 is about 17048.3125557927. The cubic root of 290644961 is about 662.4009286291.

The spelling of 290644961 in words is "two hundred ninety million, six hundred forty-four thousand, nine hundred sixty-one".