45639719 has 4 divisors (see below), whose sum is σ = 47112000. Its totient is φ = 44167440.

The previous prime is 45639701. The next prime is 45639787. The reversal of 45639719 is 91793654.

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 45639719 - 2²⁰ = 44591143 is a prime.

It is a super-2 number, since 2×45639719² = 4165967900797922, which contains 22 as substring.

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 45639719.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (45639799) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 736094 + ... + 736155.

It is an arithmetic number, because the mean of its divisors is an integer number (11778000).

Almost surely, 2^45639719 is an apocalyptic number.

45639719 is a deficient number, since it is larger than the sum of its proper divisors (1472281).

45639719 is a wasteful number, since it uses less digits than its factorization.

45639719 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1472280.

The product of its digits is 204120, while the sum is 44.

The square root of 45639719 is about 6755.7175044550. The cubic root of 45639719 is about 357.3668965103.

The spelling of 45639719 in words is "forty-five million, six hundred thirty-nine thousand, seven hundred nineteen".