49431491 has 4 divisors (see below), whose sum is σ = 49941192. Its totient is φ = 48921792.

The previous prime is 49431479. The next prime is 49431493. The reversal of 49431491 is 19413494.

49431491 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-49431491 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (49431493) 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, 254705 + ... + 254898.

It is an arithmetic number, because the mean of its divisors is an integer number (12485298).

Almost surely, 2^49431491 is an apocalyptic number.

49431491 is a deficient number, since it is larger than the sum of its proper divisors (509701).

49431491 is an equidigital number, since it uses as much as digits as its factorization.

49431491 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 509700.

The product of its digits is 15552, while the sum is 35.

The square root of 49431491 is about 7030.7532313402. The cubic root of 49431491 is about 367.0015541911.

The spelling of 49431491 in words is "forty-nine million, four hundred thirty-one thousand, four hundred ninety-one".