49809923 has 4 divisors (see below), whose sum is σ = 49995360. Its totient is φ = 49624488.

The previous prime is 49809919. The next prime is 49809931. The reversal of 49809923 is 32990894.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 32990894 = 2 ⋅16495447.

It is a cyclic number.

It is not a de Polignac number, because 49809923 - 2² = 49809919 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (49809913) 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, 92315 + ... + 92852.

It is an arithmetic number, because the mean of its divisors is an integer number (12498840).

Almost surely, 2^49809923 is an apocalyptic number.

49809923 is a deficient number, since it is larger than the sum of its proper divisors (185437).

49809923 is a wasteful number, since it uses less digits than its factorization.

49809923 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 185436.

The product of its (nonzero) digits is 139968, while the sum is 44.

The square root of 49809923 is about 7057.6145403387. The cubic root of 49809923 is about 367.9357239465.

The spelling of 49809923 in words is "forty-nine million, eight hundred nine thousand, nine hundred twenty-three".