609199078 has 4 divisors (see below), whose sum is σ = 913798620. Its totient is φ = 304599538.

The previous prime is 609199039. The next prime is 609199079. The reversal of 609199078 is 870991906.

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

It is a super-2 number, since 2×609199078² = 742247033272100168, which contains 22 as substring.

It is a Smith number, since the sum of its digits (49) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (609199079) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 152299768 + ... + 152299771.

It is an arithmetic number, because the mean of its divisors is an integer number (228449655).

Almost surely, 2^609199078 is an apocalyptic number.

609199078 is a deficient number, since it is larger than the sum of its proper divisors (304599542).

609199078 is a wasteful number, since it uses less digits than its factorization.

609199078 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 304599541.

The product of its (nonzero) digits is 244944, while the sum is 49.

The square root of 609199078 is about 24681.9585527567. The cubic root of 609199078 is about 847.7212681219.

The spelling of 609199078 in words is "six hundred nine million, one hundred ninety-nine thousand, seventy-eight".