45781447 has 2 divisors, whose sum is σ = 45781448. Its totient is φ = 45781446.

The previous prime is 45781441. The next prime is 45781481. The reversal of 45781447 is 74418754.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 45781447 - 2⁷ = 45781319 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (45781441) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 22890723 + 22890724.

It is an arithmetic number, because the mean of its divisors is an integer number (22890724).

Almost surely, 2^45781447 is an apocalyptic number.

45781447 is a deficient number, since it is larger than the sum of its proper divisors (1).

45781447 is an equidigital number, since it uses as much as digits as its factorization.

45781447 is an evil number, because the sum of its binary digits is even.

The product of its digits is 125440, while the sum is 40.

The square root of 45781447 is about 6766.1988590345. The cubic root of 45781447 is about 357.7364325132.

The spelling of 45781447 in words is "forty-five million, seven hundred eighty-one thousand, four hundred forty-seven".