63491109 has 24 divisors (see below), whose sum is σ = 96567072. Its totient is φ = 36796320.

The previous prime is 63491101. The next prime is 63491119. The reversal of 63491109 is 90119436.

It is not a de Polignac number, because 63491109 - 2³ = 63491101 is a prime.

It is a super-2 number, since 2×63491109² = 8062241844099762, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (33).

It is a self number, because there is not a number n which added to its sum of digits gives 63491109.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (63491101) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 15639 + ... + 19275.

It is an arithmetic number, because the mean of its divisors is an integer number (4023628).

Almost surely, 2^63491109 is an apocalyptic number.

63491109 is a gapful number since it is divisible by the number (69) formed by its first and last digit.

It is an amenable number.

63491109 is a deficient number, since it is larger than the sum of its proper divisors (33075963).

63491109 is a wasteful number, since it uses less digits than its factorization.

63491109 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3697 (or 3674 counting only the distinct ones).

The product of its (nonzero) digits is 5832, while the sum is 33.

The square root of 63491109 is about 7968.1308347692. The cubic root of 63491109 is about 398.9369879325.

The spelling of 63491109 in words is "sixty-three million, four hundred ninety-one thousand, one hundred nine".