290716987 has 16 divisors (see below), whose sum is σ = 334679040. Its totient is φ = 249937600.

The previous prime is 290716973. The next prime is 290716991. The reversal of 290716987 is 789617092.

It is a happy number.

It is not a de Polignac number, because 290716987 - 2⁷ = 290716859 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 290716987.

It is not an unprimeable number, because it can be changed into a prime (290716927) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 16062 + ... + 28972.

It is an arithmetic number, because the mean of its divisors is an integer number (20917440).

Almost surely, 2^290716987 is an apocalyptic number.

290716987 is a deficient number, since it is larger than the sum of its proper divisors (43962053).

290716987 is a wasteful number, since it uses less digits than its factorization.

290716987 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13034.

The product of its (nonzero) digits is 381024, while the sum is 49.

The square root of 290716987 is about 17050.4248334169. The cubic root of 290716987 is about 662.4556416010.

The spelling of 290716987 in words is "two hundred ninety million, seven hundred sixteen thousand, nine hundred eighty-seven".