45342509 has 2 divisors, whose sum is σ = 45342510. Its totient is φ = 45342508.

The previous prime is 45342487. The next prime is 45342523. The reversal of 45342509 is 90524354.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 39413284 + 5929225 = 6278^2 + 2435^2 .

It is a cyclic number.

It is not a de Polignac number, because 45342509 - 2¹² = 45338413 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (45342529) 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 as a sum of consecutive naturals, namely, 22671254 + 22671255.

It is an arithmetic number, because the mean of its divisors is an integer number (22671255).

Almost surely, 2^45342509 is an apocalyptic number.

It is an amenable number.

45342509 is a deficient number, since it is larger than the sum of its proper divisors (1).

45342509 is an equidigital number, since it uses as much as digits as its factorization.

45342509 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 21600, while the sum is 32.

The square root of 45342509 is about 6733.6846525509. The cubic root of 45342509 is about 356.5894712642.

The spelling of 45342509 in words is "forty-five million, three hundred forty-two thousand, five hundred nine".