50970989 has 4 divisors (see below), whose sum is σ = 51019740. Its totient is φ = 50922240.

The previous prime is 50970979. The next prime is 50970991. The reversal of 50970989 is 98907905.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 98907905 = 5 ⋅19781581.

It can be written as a sum of positive squares in 2 ways, for example, as 16337764 + 34633225 = 4042^2 + 5885^2 .

It is a cyclic number.

It is not a de Polignac number, because 50970989 - 2¹² = 50966893 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 (50970949) 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, 22772 + ... + 24909.

It is an arithmetic number, because the mean of its divisors is an integer number (12754935).

Almost surely, 2^50970989 is an apocalyptic number.

It is an amenable number.

50970989 is a deficient number, since it is larger than the sum of its proper divisors (48751).

50970989 is a wasteful number, since it uses less digits than its factorization.

50970989 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 48750.

The product of its (nonzero) digits is 204120, while the sum is 47.

The square root of 50970989 is about 7139.3969633296. The cubic root of 50970989 is about 370.7726464285.

The spelling of 50970989 in words is "fifty million, nine hundred seventy thousand, nine hundred eighty-nine".