45840139 has 2 divisors, whose sum is σ = 45840140. Its totient is φ = 45840138.

The previous prime is 45840133. The next prime is 45840167. The reversal of 45840139 is 93104854.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 45840139 - 2⁹ = 45839627 is a prime.

It is equal to p_2765950 and since 45840139 and 2765950 have the same sum of digits, it is a Honaker prime.

It is not a weakly prime, because it can be changed into another prime (45840133) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 22920069 + 22920070.

It is an arithmetic number, because the mean of its divisors is an integer number (22920070).

Almost surely, 2^45840139 is an apocalyptic number.

45840139 is a deficient number, since it is larger than the sum of its proper divisors (1).

45840139 is an equidigital number, since it uses as much as digits as its factorization.

45840139 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 17280, while the sum is 34.

The square root of 45840139 is about 6770.5346170003. The cubic root of 45840139 is about 357.8892404156.

The spelling of 45840139 in words is "forty-five million, eight hundred forty thousand, one hundred thirty-nine".