49178109 has 4 divisors (see below), whose sum is σ = 65570816. Its totient is φ = 32785404.

The previous prime is 49178089. The next prime is 49178123. The reversal of 49178109 is 90187194.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 49178109 - 2²⁵ = 15623677 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (49178149) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8196349 + ... + 8196354.

It is an arithmetic number, because the mean of its divisors is an integer number (16392704).

Almost surely, 2^49178109 is an apocalyptic number.

It is an amenable number.

49178109 is a deficient number, since it is larger than the sum of its proper divisors (16392707).

49178109 is a wasteful number, since it uses less digits than its factorization.

49178109 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16392706.

The product of its (nonzero) digits is 18144, while the sum is 39.

The square root of 49178109 is about 7012.7105315990. The cubic root of 49178109 is about 366.3734058240.

The spelling of 49178109 in words is "forty-nine million, one hundred seventy-eight thousand, one hundred nine".