290098661 has 4 divisors (see below), whose sum is σ = 290975424. Its totient is φ = 289221900.

The previous prime is 290098649. The next prime is 290098667. The reversal of 290098661 is 166890092.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 290098661 - 2²⁶ = 222989797 is a prime.

It is a super-2 number, since 2×290098661² = 168314466227985842, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (290098667) 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, 437885 + ... + 438546.

It is an arithmetic number, because the mean of its divisors is an integer number (72743856).

Almost surely, 2^290098661 is an apocalyptic number.

It is an amenable number.

290098661 is a deficient number, since it is larger than the sum of its proper divisors (876763).

290098661 is an equidigital number, since it uses as much as digits as its factorization.

290098661 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 876762.

The product of its (nonzero) digits is 46656, while the sum is 41.

The square root of 290098661 is about 17032.2829062930. The cubic root of 290098661 is about 661.9856492357.

The spelling of 290098661 in words is "two hundred ninety million, ninety-eight thousand, six hundred sixty-one".