45409139 has 4 divisors (see below), whose sum is σ = 46031256. Its totient is φ = 44787024.

The previous prime is 45409129. The next prime is 45409151. The reversal of 45409139 is 93190454.

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 45409139 - 2⁴ = 45409123 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 45409099 and 45409108.

It is not an unprimeable number, because it can be changed into a prime (45409109) 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, 310949 + ... + 311094.

It is an arithmetic number, because the mean of its divisors is an integer number (11507814).

Almost surely, 2^45409139 is an apocalyptic number.

45409139 is a deficient number, since it is larger than the sum of its proper divisors (622117).

45409139 is an equidigital number, since it uses as much as digits as its factorization.

45409139 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 622116.

The product of its (nonzero) digits is 19440, while the sum is 35.

The square root of 45409139 is about 6738.6303504496. The cubic root of 45409139 is about 356.7640530448.

The spelling of 45409139 in words is "forty-five million, four hundred nine thousand, one hundred thirty-nine".