290418997 has 6 divisors (see below), whose sum is σ = 319221014. Its totient is φ = 264017160.

The previous prime is 290418979. The next prime is 290419001. The reversal of 290418997 is 799814092.

It can be written as a sum of positive squares in only one way, i.e., 260047876 + 30371121 = 16126^2 + 5511^2 .

It is a de Polignac number, because none of the positive numbers 2^k-290418997 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 290418997.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (290418917) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1199958 + ... + 1200199.

Almost surely, 2^290418997 is an apocalyptic number.

It is an amenable number.

290418997 is a deficient number, since it is larger than the sum of its proper divisors (28802017).

290418997 is a wasteful number, since it uses less digits than its factorization.

290418997 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2400179 (or 2400168 counting only the distinct ones).

The product of its (nonzero) digits is 326592, while the sum is 49.

The square root of 290418997 is about 17041.6841010506. The cubic root of 290418997 is about 662.2292213460.

The spelling of 290418997 in words is "two hundred ninety million, four hundred eighteen thousand, nine hundred ninety-seven".