451367989 has 2 divisors, whose sum is σ = 451367990. Its totient is φ = 451367988.

The previous prime is 451367963. The next prime is 451368017. The reversal of 451367989 is 989763154.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 408727089 + 42640900 = 20217^2 + 6530^2 .

It is a cyclic number.

It is not a de Polignac number, because 451367989 - 2⁵ = 451367957 is a prime.

It is a super-2 number, since 2×451367989² = 407466122987808242, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (451367929) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 225683994 + 225683995.

It is an arithmetic number, because the mean of its divisors is an integer number (225683995).

Almost surely, 2^451367989 is an apocalyptic number.

It is an amenable number.

451367989 is a deficient number, since it is larger than the sum of its proper divisors (1).

451367989 is an equidigital number, since it uses as much as digits as its factorization.

451367989 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1632960, while the sum is 52.

The square root of 451367989 is about 21245.4227776244. The cubic root of 451367989 is about 767.0851674993.

The spelling of 451367989 in words is "four hundred fifty-one million, three hundred sixty-seven thousand, nine hundred eighty-nine".