49739861 has 4 divisors (see below), whose sum is σ = 50196300. Its totient is φ = 49283424.

The previous prime is 49739857. The next prime is 49739897. The reversal of 49739861 is 16893794.

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

It can be written as a sum of positive squares in 2 ways, for example, as 18447025 + 31292836 = 4295^2 + 5594^2 .

It is a cyclic number.

It is not a de Polignac number, because 49739861 - 2² = 49739857 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 (49739801) 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, 228056 + ... + 228273.

It is an arithmetic number, because the mean of its divisors is an integer number (12549075).

Almost surely, 2^49739861 is an apocalyptic number.

It is an amenable number.

49739861 is a deficient number, since it is larger than the sum of its proper divisors (456439).

49739861 is a wasteful number, since it uses less digits than its factorization.

49739861 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 456438.

The product of its digits is 326592, while the sum is 47.

The square root of 49739861 is about 7052.6492185561. The cubic root of 49739861 is about 367.7631317729.

The spelling of 49739861 in words is "forty-nine million, seven hundred thirty-nine thousand, eight hundred sixty-one".