50990749 has 4 divisors (see below), whose sum is σ = 51101820. Its totient is φ = 50879680.

The previous prime is 50990741. The next prime is 50990767. The reversal of 50990749 is 94709905.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 94709905 = 5 ⋅18941981.

It can be written as a sum of positive squares in 2 ways, for example, as 32285124 + 18705625 = 5682^2 + 4325^2 .

It is a cyclic number.

It is not a de Polignac number, because 50990749 - 2³ = 50990741 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 (50990741) 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, 54844 + ... + 55765.

It is an arithmetic number, because the mean of its divisors is an integer number (12775455).

Almost surely, 2^50990749 is an apocalyptic number.

It is an amenable number.

50990749 is a deficient number, since it is larger than the sum of its proper divisors (111071).

50990749 is a wasteful number, since it uses less digits than its factorization.

50990749 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 111070.

The product of its (nonzero) digits is 102060, while the sum is 43.

The square root of 50990749 is about 7140.7806996154. The cubic root of 50990749 is about 370.8205529016.

The spelling of 50990749 in words is "fifty million, nine hundred ninety thousand, seven hundred forty-nine".