49137309 has 24 divisors (see below), whose sum is σ = 77157080. Its totient is φ = 29953152.

The previous prime is 49137301. The next prime is 49137323. The reversal of 49137309 is 90373194.

It can be written as a sum of positive squares in 4 ways, for example, as 17665209 + 31472100 = 4203^2 + 5610^2 .

It is not a de Polignac number, because 49137309 - 2³ = 49137301 is a prime.

It is a super-2 number, since 2×49137309² = 4828950271522962, which contains 22 as substring.

It is a hoax number, since the sum of its digits (36) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (49137301) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 10827 + ... + 14679.

Almost surely, 2^49137309 is an apocalyptic number.

It is an amenable number.

49137309 is a deficient number, since it is larger than the sum of its proper divisors (28019771).

49137309 is a wasteful number, since it uses less digits than its factorization.

49137309 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3981 (or 3978 counting only the distinct ones).

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

The square root of 49137309 is about 7009.8009244200. The cubic root of 49137309 is about 366.2720587614.

The spelling of 49137309 in words is "forty-nine million, one hundred thirty-seven thousand, three hundred nine".