649022787 has 60 divisors (see below), whose sum is σ = 1194284520. Its totient is φ = 349017984.

The previous prime is 649022783. The next prime is 649022791. The reversal of 649022787 is 787220946.

It is an interprime number because it is at equal distance from previous prime (649022783) and next prime (649022791).

It is not a de Polignac number, because 649022787 - 2² = 649022783 is a prime.

It is not an unprimeable number, because it can be changed into a prime (649022783) by changing a digit.

It is a polite number, since it can be written in 59 ways as a sum of consecutive naturals, for example, 62664 + ... + 72282.

It is an arithmetic number, because the mean of its divisors is an integer number (19904742).

Almost surely, 2^649022787 is an apocalyptic number.

649022787 is a deficient number, since it is larger than the sum of its proper divisors (545261733).

649022787 is a wasteful number, since it uses less digits than its factorization.

649022787 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9662 (or 9646 counting only the distinct ones).

The product of its (nonzero) digits is 338688, while the sum is 45.

The square root of 649022787 is about 25475.9256357841. The cubic root of 649022787 is about 865.8047849921.

The spelling of 649022787 in words is "six hundred forty-nine million, twenty-two thousand, seven hundred eighty-seven".