609190857 has 24 divisors (see below), whose sum is σ = 1001677248. Its totient is φ = 353152800.

The previous prime is 609190853. The next prime is 609190873. The reversal of 609190857 is 758091906.

It is not a de Polignac number, because 609190857 - 2² = 609190853 is a prime.

It is a super-2 number, since 2×609190857² = 742227000504788898, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (609190853) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 131494 + ... + 136047.

It is an arithmetic number, because the mean of its divisors is an integer number (41736552).

Almost surely, 2^609190857 is an apocalyptic number.

It is an amenable number.

609190857 is a deficient number, since it is larger than the sum of its proper divisors (392486391).

609190857 is a wasteful number, since it uses less digits than its factorization.

609190857 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 267581 (or 267578 counting only the distinct ones).

The product of its (nonzero) digits is 136080, while the sum is 45.

The square root of 609190857 is about 24681.7920135472. The cubic root of 609190857 is about 847.7174548376.

The spelling of 609190857 in words is "six hundred nine million, one hundred ninety thousand, eight hundred fifty-seven".