49621739 has 4 divisors (see below), whose sum is σ = 49873824. Its totient is φ = 49369656.

The previous prime is 49621729. The next prime is 49621769. The reversal of 49621739 is 93712694.

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

It is a cyclic number.

It is not a de Polignac number, because 49621739 - 2¹⁶ = 49556203 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 49621696 and 49621705.

It is not an unprimeable number, because it can be changed into a prime (49621709) 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, 125747 + ... + 126140.

It is an arithmetic number, because the mean of its divisors is an integer number (12468456).

Almost surely, 2^49621739 is an apocalyptic number.

49621739 is a deficient number, since it is larger than the sum of its proper divisors (252085).

49621739 is a wasteful number, since it uses less digits than its factorization.

49621739 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 252084.

The product of its digits is 81648, while the sum is 41.

The square root of 49621739 is about 7044.2699408810. The cubic root of 49621739 is about 367.4717802694.

The spelling of 49621739 in words is "forty-nine million, six hundred twenty-one thousand, seven hundred thirty-nine".