649622091 has 8 divisors (see below), whose sum is σ = 867516624. Its totient is φ = 432404480.

The previous prime is 649622059. The next prime is 649622117. The reversal of 649622091 is 190226946.

649622091 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 649622091 - 2⁵ = 649622059 is a prime.

It is a super-2 number, since 2×649622091² = 844017722230424562, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (649622021) 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, 166986 + ... + 170831.

It is an arithmetic number, because the mean of its divisors is an integer number (108439578).

Almost surely, 2^649622091 is an apocalyptic number.

649622091 is a deficient number, since it is larger than the sum of its proper divisors (217894533).

649622091 is a wasteful number, since it uses less digits than its factorization.

649622091 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 338461.

The product of its (nonzero) digits is 46656, while the sum is 39.

The square root of 649622091 is about 25487.6850851544. The cubic root of 649622091 is about 866.0711961016.

The spelling of 649622091 in words is "six hundred forty-nine million, six hundred twenty-two thousand, ninety-one".