454633991 has 4 divisors (see below), whose sum is σ = 519581712. Its totient is φ = 389686272.

The previous prime is 454633987. The next prime is 454633997. The reversal of 454633991 is 199336454.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 199336454 = 2 ⋅99668227.

It is a cyclic number.

It is not a de Polignac number, because 454633991 - 2² = 454633987 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (454633997) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 32473850 + ... + 32473863.

It is an arithmetic number, because the mean of its divisors is an integer number (129895428).

Almost surely, 2^454633991 is an apocalyptic number.

454633991 is a deficient number, since it is larger than the sum of its proper divisors (64947721).

454633991 is an equidigital number, since it uses as much as digits as its factorization.

454633991 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 64947720.

The product of its digits is 349920, while the sum is 44.

The square root of 454633991 is about 21322.1478983708. The cubic root of 454633991 is about 768.9308775168.

The spelling of 454633991 in words is "four hundred fifty-four million, six hundred thirty-three thousand, nine hundred ninety-one".