451937861 has 2 divisors, whose sum is σ = 451937862. Its totient is φ = 451937860.

The previous prime is 451937839. The next prime is 451937867. The reversal of 451937861 is 168739154.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 325802500 + 126135361 = 18050^2 + 11231^2 .

It is a cyclic number.

It is not a de Polignac number, because 451937861 - 2⁶ = 451937797 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (451937867) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 225968930 + 225968931.

It is an arithmetic number, because the mean of its divisors is an integer number (225968931).

Almost surely, 2^451937861 is an apocalyptic number.

It is an amenable number.

451937861 is a deficient number, since it is larger than the sum of its proper divisors (1).

451937861 is an equidigital number, since it uses as much as digits as its factorization.

451937861 is an evil number, because the sum of its binary digits is even.

The product of its digits is 181440, while the sum is 44.

The square root of 451937861 is about 21258.8301888886. The cubic root of 451937861 is about 767.4078580227.

The spelling of 451937861 in words is "four hundred fifty-one million, nine hundred thirty-seven thousand, eight hundred sixty-one".