690000649 has 8 divisors (see below), whose sum is σ = 753544512. Its totient is φ = 627952080.

The previous prime is 690000617. The next prime is 690000659. The reversal of 690000649 is 946000096.

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 690000649 - 2⁵ = 690000617 is a prime.

It is a super-2 number, since 2×690000649² = 952201791240842402, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (690000659) 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, 372859 + ... + 374704.

It is an arithmetic number, because the mean of its divisors is an integer number (94193064).

Almost surely, 2^690000649 is an apocalyptic number.

It is an amenable number.

690000649 is a deficient number, since it is larger than the sum of its proper divisors (63543863).

690000649 is a wasteful number, since it uses less digits than its factorization.

690000649 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 747647.

The product of its (nonzero) digits is 11664, while the sum is 34.

The square root of 690000649 is about 26267.8634266284. The cubic root of 690000649 is about 883.6558692898.

The spelling of 690000649 in words is "six hundred ninety million, six hundred forty-nine", and thus it is an aban number.