50011389 has 6 divisors (see below), whose sum is σ = 72238686. Its totient is φ = 33340920.

The previous prime is 50011387. The next prime is 50011391. The reversal of 50011389 is 98311005.

It is an interprime number because it is at equal distance from previous prime (50011387) and next prime (50011391).

It can be written as a sum of positive squares in only one way, i.e., 36505764 + 13505625 = 6042^2 + 3675^2 .

It is not a de Polignac number, because 50011389 - 2¹ = 50011387 is a prime.

It is a super-2 number, since 2×50011389² = 5002278059418642, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (50011387) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 2778402 + ... + 2778419.

It is an arithmetic number, because the mean of its divisors is an integer number (12039781).

Almost surely, 2^50011389 is an apocalyptic number.

It is an amenable number.

50011389 is a deficient number, since it is larger than the sum of its proper divisors (22227297).

50011389 is a wasteful number, since it uses less digits than its factorization.

50011389 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5556827 (or 5556824 counting only the distinct ones).

The product of its (nonzero) digits is 1080, while the sum is 27.

The square root of 50011389 is about 7071.8730899246. The cubic root of 50011389 is about 368.4311193637.

The spelling of 50011389 in words is "fifty million, eleven thousand, three hundred eighty-nine".