49309731 has 12 divisors (see below), whose sum is σ = 74974120. Its totient is φ = 31142880.

The previous prime is 49309717. The next prime is 49309751. The reversal of 49309731 is 13790394.

It is not a de Polignac number, because 49309731 - 2⁹ = 49309219 is a prime.

It is a super-2 number, since 2×49309731² = 4862899142584722, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (49309751) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 144010 + ... + 144351.

Almost surely, 2^49309731 is an apocalyptic number.

49309731 is a deficient number, since it is larger than the sum of its proper divisors (25664389).

49309731 is a wasteful number, since it uses less digits than its factorization.

49309731 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 288386 (or 288383 counting only the distinct ones).

The product of its (nonzero) digits is 20412, while the sum is 36.

The square root of 49309731 is about 7022.0887918055. The cubic root of 49309731 is about 366.6999728239.

The spelling of 49309731 in words is "forty-nine million, three hundred nine thousand, seven hundred thirty-one".