45123791 has 2 divisors, whose sum is σ = 45123792. Its totient is φ = 45123790.

The previous prime is 45123691. The next prime is 45123809. The reversal of 45123791 is 19732154.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 45123791 - 2¹⁰ = 45122767 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (45123191) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 22561895 + 22561896.

It is an arithmetic number, because the mean of its divisors is an integer number (22561896).

Almost surely, 2^45123791 is an apocalyptic number.

45123791 is a deficient number, since it is larger than the sum of its proper divisors (1).

45123791 is an equidigital number, since it uses as much as digits as its factorization.

45123791 is an evil number, because the sum of its binary digits is even.

The product of its digits is 7560, while the sum is 32.

The square root of 45123791 is about 6717.4244320275. The cubic root of 45123791 is about 356.0151884064.

It can be divided in two parts, 451 and 23791, that added together give a palindrome (24242).

The spelling of 45123791 in words is "forty-five million, one hundred twenty-three thousand, seven hundred ninety-one".