450931813 has 4 divisors (see below), whose sum is σ = 470537568. Its totient is φ = 431326060.

The previous prime is 450931777. The next prime is 450931823. The reversal of 450931813 is 318139054.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 450931813 - 2¹³ = 450923621 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 (450931823) 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, 9802843 + ... + 9802888.

It is an arithmetic number, because the mean of its divisors is an integer number (117634392).

Almost surely, 2^450931813 is an apocalyptic number.

It is an amenable number.

450931813 is a deficient number, since it is larger than the sum of its proper divisors (19605755).

450931813 is a wasteful number, since it uses less digits than its factorization.

450931813 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19605754.

The product of its (nonzero) digits is 12960, while the sum is 34.

The square root of 450931813 is about 21235.1551206955. The cubic root of 450931813 is about 766.8379989064.

The spelling of 450931813 in words is "four hundred fifty million, nine hundred thirty-one thousand, eight hundred thirteen".