109772639 has 4 divisors (see below), whose sum is σ = 109846800. Its totient is φ = 109698480.

The previous prime is 109772623. The next prime is 109772651. The reversal of 109772639 is 936277901.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 109772639 - 2⁴ = 109772623 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 109772639.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (109772659) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 34814 + ... + 37835.

It is an arithmetic number, because the mean of its divisors is an integer number (27461700).

Almost surely, 2^109772639 is an apocalyptic number.

109772639 is a deficient number, since it is larger than the sum of its proper divisors (74161).

109772639 is an equidigital number, since it uses as much as digits as its factorization.

109772639 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 74160.

The product of its (nonzero) digits is 142884, while the sum is 44.

The square root of 109772639 is about 10477.2438646812. The cubic root of 109772639 is about 478.8116422434.

The spelling of 109772639 in words is "one hundred nine million, seven hundred seventy-two thousand, six hundred thirty-nine".