609189851 has 4 divisors (see below), whose sum is σ = 609403032. Its totient is φ = 608976672.

The previous prime is 609189829. The next prime is 609189853. The reversal of 609189851 is 158981906.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 609189851 - 2¹⁸ = 608927707 is a prime.

It is a super-2 number, since 2×609189851² = 742224549122804402, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 609189796 and 609189805.

It is not an unprimeable number, because it can be changed into a prime (609189853) 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, 102245 + ... + 108038.

It is an arithmetic number, because the mean of its divisors is an integer number (152350758).

Almost surely, 2^609189851 is an apocalyptic number.

609189851 is a deficient number, since it is larger than the sum of its proper divisors (213181).

609189851 is a wasteful number, since it uses less digits than its factorization.

609189851 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 213180.

The product of its (nonzero) digits is 155520, while the sum is 47.

The square root of 609189851 is about 24681.7716341433. The cubic root of 609189851 is about 847.7169882054.

The spelling of 609189851 in words is "six hundred nine million, one hundred eighty-nine thousand, eight hundred fifty-one".