49861389 has 4 divisors (see below), whose sum is σ = 66481856. Its totient is φ = 33240924.

The previous prime is 49861387. The next prime is 49861397. The reversal of 49861389 is 98316894.

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 49861389 - 2¹ = 49861387 is a prime.

It is a super-2 number, since 2×49861389² = 4972316226018642, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (49861387) 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, 8310229 + ... + 8310234.

It is an arithmetic number, because the mean of its divisors is an integer number (16620464).

Almost surely, 2^49861389 is an apocalyptic number.

It is an amenable number.

49861389 is a deficient number, since it is larger than the sum of its proper divisors (16620467).

49861389 is a wasteful number, since it uses less digits than its factorization.

49861389 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16620466.

The product of its digits is 373248, while the sum is 48.

The square root of 49861389 is about 7061.2597318042. The cubic root of 49861389 is about 368.0624032682.

The spelling of 49861389 in words is "forty-nine million, eight hundred sixty-one thousand, three hundred eighty-nine".