450278623 has 2 divisors, whose sum is σ = 450278624. Its totient is φ = 450278622.

The previous prime is 450278603. The next prime is 450278639. The reversal of 450278623 is 326872054.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 450278623 - 2²¹ = 448181471 is a prime.

It is a super-2 number, since 2×450278623² = 405501676661552258, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (450278603) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 225139311 + 225139312.

It is an arithmetic number, because the mean of its divisors is an integer number (225139312).

Almost surely, 2^450278623 is an apocalyptic number.

450278623 is a deficient number, since it is larger than the sum of its proper divisors (1).

450278623 is an equidigital number, since it uses as much as digits as its factorization.

450278623 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 80640, while the sum is 37.

The square root of 450278623 is about 21219.7696264592. The cubic root of 450278623 is about 766.4675563803.

The spelling of 450278623 in words is "four hundred fifty million, two hundred seventy-eight thousand, six hundred twenty-three".