890649717 has 4 divisors (see below), whose sum is σ = 1187532960. Its totient is φ = 593766476.

The previous prime is 890649707. The next prime is 890649733. The reversal of 890649717 is 717946098.

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 890649717 - 2⁴ = 890649701 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 890649717.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (890649707) 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, 148441617 + ... + 148441622.

It is an arithmetic number, because the mean of its divisors is an integer number (296883240).

Almost surely, 2^890649717 is an apocalyptic number.

It is an amenable number.

890649717 is a deficient number, since it is larger than the sum of its proper divisors (296883243).

890649717 is a wasteful number, since it uses less digits than its factorization.

890649717 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 296883242.

The product of its (nonzero) digits is 762048, while the sum is 51.

The square root of 890649717 is about 29843.7550753922. The cubic root of 890649717 is about 962.1341831722.

The spelling of 890649717 in words is "eight hundred ninety million, six hundred forty-nine thousand, seven hundred seventeen".