450621931 has 2 divisors, whose sum is σ = 450621932. Its totient is φ = 450621930.

The previous prime is 450621893. The next prime is 450621943. The reversal of 450621931 is 139126054.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 450621931 - 2⁹ = 450621419 is a prime.

It is a super-2 number, since 2×450621931² = 406120249396337522, which contains 22 as substring.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 450621893 and 450621902.

It is not a weakly prime, because it can be changed into another prime (450621961) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 225310965 + 225310966.

It is an arithmetic number, because the mean of its divisors is an integer number (225310966).

Almost surely, 2^450621931 is an apocalyptic number.

450621931 is a deficient number, since it is larger than the sum of its proper divisors (1).

450621931 is an equidigital number, since it uses as much as digits as its factorization.

450621931 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 6480, while the sum is 31.

The square root of 450621931 is about 21227.8574283888. The cubic root of 450621931 is about 766.6623006893.

Adding to 450621931 its reverse (139126054), we get a palindrome (589747985).

The spelling of 450621931 in words is "four hundred fifty million, six hundred twenty-one thousand, nine hundred thirty-one".