45724381 has 2 divisors, whose sum is σ = 45724382. Its totient is φ = 45724380.

The previous prime is 45724379. The next prime is 45724409. The reversal of 45724381 is 18342754.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 33235225 + 12489156 = 5765^2 + 3534^2 .

It is a cyclic number.

It is not a de Polignac number, because 45724381 - 2¹ = 45724379 is a prime.

It is a super-2 number, since 2×45724381² = 4181438035666322, which contains 22 as substring.

Together with 45724379, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (45724181) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 22862190 + 22862191.

It is an arithmetic number, because the mean of its divisors is an integer number (22862191).

Almost surely, 2^45724381 is an apocalyptic number.

It is an amenable number.

45724381 is a deficient number, since it is larger than the sum of its proper divisors (1).

45724381 is an equidigital number, since it uses as much as digits as its factorization.

45724381 is an evil number, because the sum of its binary digits is even.

The product of its digits is 26880, while the sum is 34.

The square root of 45724381 is about 6761.9805530628. The cubic root of 45724381 is about 357.5877327185.

The spelling of 45724381 in words is "forty-five million, seven hundred twenty-four thousand, three hundred eighty-one".