50426989 has 4 divisors (see below), whose sum is σ = 50562556. Its totient is φ = 50291424.

The previous prime is 50426983. The next prime is 50427011. The reversal of 50426989 is 98962405.

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 33756100 + 16670889 = 5810^2 + 4083^2 .

It is a cyclic number.

It is not a de Polignac number, because 50426989 - 2⁷ = 50426861 is a prime.

It is a super-2 number, since 2×50426989² = 5085762439212242, 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 (50426983) 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, 67224 + ... + 67969.

It is an arithmetic number, because the mean of its divisors is an integer number (12640639).

Almost surely, 2^50426989 is an apocalyptic number.

It is an amenable number.

50426989 is a deficient number, since it is larger than the sum of its proper divisors (135567).

50426989 is a wasteful number, since it uses less digits than its factorization.

50426989 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 135566.

The product of its (nonzero) digits is 155520, while the sum is 43.

The square root of 50426989 is about 7101.1963076653. The cubic root of 50426989 is about 369.4488726919.

It can be divided in two parts, 50426 and 989, that added together give a palindrome (51415).

The spelling of 50426989 in words is "fifty million, four hundred twenty-six thousand, nine hundred eighty-nine".