449891931 has 8 divisors (see below), whose sum is σ = 611174160. Its totient is φ = 294268832.

The previous prime is 449891921. The next prime is 449891947. The reversal of 449891931 is 139198944.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 449891931 - 2⁹ = 449891419 is a prime.

It is a super-2 number, since 2×449891931² = 404805499157817522, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (449891921) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1414596 + ... + 1414913.

It is an arithmetic number, because the mean of its divisors is an integer number (76396770).

Almost surely, 2^449891931 is an apocalyptic number.

449891931 is a deficient number, since it is larger than the sum of its proper divisors (161282229).

449891931 is a wasteful number, since it uses less digits than its factorization.

449891931 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2829565.

The product of its digits is 279936, while the sum is 48.

The square root of 449891931 is about 21210.6560718899. The cubic root of 449891931 is about 766.2480835607.

The spelling of 449891931 in words is "four hundred forty-nine million, eight hundred ninety-one thousand, nine hundred thirty-one".