451431091 has 2 divisors, whose sum is σ = 451431092. Its totient is φ = 451431090.

The previous prime is 451431077. The next prime is 451431119. The reversal of 451431091 is 190134154.

It is an a-pointer prime, because the next prime (451431119) can be obtained adding 451431091 to its sum of digits (28).

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 451431091 - 2¹⁷ = 451300019 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (451431011) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 225715545 + 225715546.

It is an arithmetic number, because the mean of its divisors is an integer number (225715546).

Almost surely, 2^451431091 is an apocalyptic number.

451431091 is a deficient number, since it is larger than the sum of its proper divisors (1).

451431091 is an equidigital number, since it uses as much as digits as its factorization.

451431091 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2160, while the sum is 28.

The square root of 451431091 is about 21246.9077985480. The cubic root of 451431091 is about 767.1209124302.

The spelling of 451431091 in words is "four hundred fifty-one million, four hundred thirty-one thousand, ninety-one".