451032649 has 4 divisors (see below), whose sum is σ = 451220164. Its totient is φ = 450845136.

The previous prime is 451032643. The next prime is 451032653. The reversal of 451032649 is 946230154.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 265201225 + 185831424 = 16285^2 + 13632^2 .

It is a cyclic number.

It is not a de Polignac number, because 451032649 - 2³ = 451032641 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (451032641) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 90102 + ... + 94975.

It is an arithmetic number, because the mean of its divisors is an integer number (112805041).

Almost surely, 2^451032649 is an apocalyptic number.

It is an amenable number.

451032649 is a deficient number, since it is larger than the sum of its proper divisors (187515).

451032649 is a wasteful number, since it uses less digits than its factorization.

451032649 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 187514.

The product of its (nonzero) digits is 25920, while the sum is 34.

The square root of 451032649 is about 21237.5292583671. The cubic root of 451032649 is about 766.8951539731.

The spelling of 451032649 in words is "four hundred fifty-one million, thirty-two thousand, six hundred forty-nine".