45071639 has 4 divisors (see below), whose sum is σ = 45089856. Its totient is φ = 45053424.

The previous prime is 45071627. The next prime is 45071657. The reversal of 45071639 is 93617054.

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 45071639 - 2⁴ = 45071623 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 45071599 and 45071608.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (45071239) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4679 + ... + 10584.

It is an arithmetic number, because the mean of its divisors is an integer number (11272464).

Almost surely, 2^45071639 is an apocalyptic number.

45071639 is a deficient number, since it is larger than the sum of its proper divisors (18217).

45071639 is a wasteful number, since it uses less digits than its factorization.

45071639 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18216.

The product of its (nonzero) digits is 22680, while the sum is 35.

The square root of 45071639 is about 6713.5414648306. The cubic root of 45071639 is about 355.8779802123.

The spelling of 45071639 in words is "forty-five million, seventy-one thousand, six hundred thirty-nine".