49123918 has 4 divisors (see below), whose sum is σ = 73685880. Its totient is φ = 24561958.

The previous prime is 49123913. The next prime is 49123961. The reversal of 49123918 is 81932194.

It is a semiprime because it is the product of two primes.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (49123913) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12280978 + ... + 12280981.

It is an arithmetic number, because the mean of its divisors is an integer number (18421470).

Almost surely, 2^49123918 is an apocalyptic number.

49123918 is a deficient number, since it is larger than the sum of its proper divisors (24561962).

49123918 is a wasteful number, since it uses less digits than its factorization.

49123918 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24561961.

The product of its digits is 15552, while the sum is 37.

The square root of 49123918 is about 7008.8456966893. The cubic root of 49123918 is about 366.2387833348.

The spelling of 49123918 in words is "forty-nine million, one hundred twenty-three thousand, nine hundred eighteen".