49857397 has 4 divisors (see below), whose sum is σ = 49871520. Its totient is φ = 49843276.

The previous prime is 49857377. The next prime is 49857403. The reversal of 49857397 is 79375894.

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, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 49857397 - 2¹¹ = 49855349 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 (49857347) 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, 3504 + ... + 10582.

It is an arithmetic number, because the mean of its divisors is an integer number (12467880).

Almost surely, 2^49857397 is an apocalyptic number.

It is an amenable number.

49857397 is a deficient number, since it is larger than the sum of its proper divisors (14123).

49857397 is an equidigital number, since it uses as much as digits as its factorization.

49857397 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14122.

The product of its digits is 1905120, while the sum is 52.

The square root of 49857397 is about 7060.9770570368. The cubic root of 49857397 is about 368.0525804083.

The spelling of 49857397 in words is "forty-nine million, eight hundred fifty-seven thousand, three hundred ninety-seven".