49138791 has 16 divisors (see below), whose sum is σ = 71892576. Its totient is φ = 29667456.

The previous prime is 49138781. The next prime is 49138801. The reversal of 49138791 is 19783194.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (49138781) and next prime (49138801).

It is not a de Polignac number, because 49138791 - 2⁵ = 49138759 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (49138781) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 9820 + ... + 13953.

It is an arithmetic number, because the mean of its divisors is an integer number (4493286).

Almost surely, 2^49138791 is an apocalyptic number.

49138791 is a deficient number, since it is larger than the sum of its proper divisors (22753785).

49138791 is a wasteful number, since it uses less digits than its factorization.

49138791 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23842.

The product of its digits is 54432, while the sum is 42.

The square root of 49138791 is about 7009.9066327591. The cubic root of 49138791 is about 366.2757410261.

The spelling of 49138791 in words is "forty-nine million, one hundred thirty-eight thousand, seven hundred ninety-one".