49157919 has 6 divisors (see below), whose sum is σ = 71005896. Its totient is φ = 32771940.

The previous prime is 49157917. The next prime is 49157947. The reversal of 49157919 is 91975194.

It is not a de Polignac number, because 49157919 - 2¹ = 49157917 is a prime.

It is a super-2 number, since 2×49157919² = 4833002000821122, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (49157917) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 2730987 + ... + 2731004.

It is an arithmetic number, because the mean of its divisors is an integer number (11834316).

Almost surely, 2^49157919 is an apocalyptic number.

49157919 is a deficient number, since it is larger than the sum of its proper divisors (21847977).

49157919 is a wasteful number, since it uses less digits than its factorization.

49157919 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5461997 (or 5461994 counting only the distinct ones).

The product of its digits is 102060, while the sum is 45.

The square root of 49157919 is about 7011.2708548451. The cubic root of 49157919 is about 366.3232609409.

The spelling of 49157919 in words is "forty-nine million, one hundred fifty-seven thousand, nine hundred nineteen".