2045723139 has 12 divisors (see below), whose sum is σ = 3050254272. Its totient is φ = 1319821200.

The previous prime is 2045723131. The next prime is 2045723149. The reversal of 2045723139 is 9313275402.

2045723139 is a `hidden beast` number, since 20 + 4 + 572 + 31 + 39 = 666.

It is not a de Polignac number, because 2045723139 - 2³ = 2045723131 is a prime.

It is a super-2 number, since 2×2045723139² = 8369966322880026642, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (2045723131) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 3665892 + ... + 3666449.

It is an arithmetic number, because the mean of its divisors is an integer number (254187856).

Almost surely, 2^2045723139 is an apocalyptic number.

2045723139 is a deficient number, since it is larger than the sum of its proper divisors (1004531133).

2045723139 is a wasteful number, since it uses less digits than its factorization.

2045723139 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7332378 (or 7332375 counting only the distinct ones).

The product of its (nonzero) digits is 45360, while the sum is 36.

The square root of 2045723139 is about 45229.6710025620. The cubic root of 2045723139 is about 1269.4500561880.

The spelling of 2045723139 in words is "two billion, forty-five million, seven hundred twenty-three thousand, one hundred thirty-nine".