450626381 has 2 divisors, whose sum is σ = 450626382. Its totient is φ = 450626380.

The previous prime is 450626329. The next prime is 450626411. The reversal of 450626381 is 183626054.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 397204900 + 53421481 = 19930^2 + 7309^2 .

It is a cyclic number.

It is not a de Polignac number, because 450626381 - 2²⁶ = 383517517 is a prime.

It is a super-2 number, since 2×450626381² = 406128270506314322, which contains 22 as substring.

It is a Sophie Germain prime.

It is a Chen prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (450626311) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 225313190 + 225313191.

It is an arithmetic number, because the mean of its divisors is an integer number (225313191).

Almost surely, 2^450626381 is an apocalyptic number.

It is an amenable number.

450626381 is a deficient number, since it is larger than the sum of its proper divisors (1).

450626381 is an equidigital number, since it uses as much as digits as its factorization.

450626381 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 34560, while the sum is 35.

The square root of 450626381 is about 21227.9622432300. The cubic root of 450626381 is about 766.6648243392.

The spelling of 450626381 in words is "four hundred fifty million, six hundred twenty-six thousand, three hundred eighty-one".