2989203857 has 4 divisors (see below), whose sum is σ = 3165039396. Its totient is φ = 2813368320.

The previous prime is 2989203829. The next prime is 2989203859. The reversal of 2989203857 is 7583029892.

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 2803808401 + 185395456 = 52951^2 + 13616^2 .

It is a cyclic number.

It is not a de Polignac number, because 2989203857 - 2⁶ = 2989203793 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 2989203799 and 2989203808.

It is not an unprimeable number, because it can be changed into a prime (2989203859) 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, 87917744 + ... + 87917777.

It is an arithmetic number, because the mean of its divisors is an integer number (791259849).

Almost surely, 2^2989203857 is an apocalyptic number.

It is an amenable number.

2989203857 is a deficient number, since it is larger than the sum of its proper divisors (175835539).

2989203857 is a wasteful number, since it uses less digits than its factorization.

2989203857 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 175835538.

The product of its (nonzero) digits is 2177280, while the sum is 53.

The square root of 2989203857 is about 54673.6120720042. The cubic root of 2989203857 is about 1440.5174093916.

The spelling of 2989203857 in words is "two billion, nine hundred eighty-nine million, two hundred three thousand, eight hundred fifty-seven".