63621790 has 16 divisors (see below), whose sum is σ = 114706368. Its totient is φ = 25407136.

The previous prime is 63621787. The next prime is 63621797. The reversal of 63621790 is 9712636.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (63621797) 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, 1659 + ... + 11401.

It is an arithmetic number, because the mean of its divisors is an integer number (7169148).

Almost surely, 2^63621790 is an apocalyptic number.

63621790 is a deficient number, since it is larger than the sum of its proper divisors (51084578).

63621790 is a wasteful number, since it uses less digits than its factorization.

63621790 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10403.

The product of its (nonzero) digits is 13608, while the sum is 34.

The square root of 63621790 is about 7976.3268488697. The cubic root of 63621790 is about 399.2105052704.

The spelling of 63621790 in words is "sixty-three million, six hundred twenty-one thousand, seven hundred ninety".