609429878 has 4 divisors (see below), whose sum is σ = 914144820. Its totient is φ = 304714938.

The previous prime is 609429869. The next prime is 609429893. The reversal of 609429878 is 878924906.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 878924906 = 2 ⋅439462453.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 152357468 + ... + 152357471.

It is an arithmetic number, because the mean of its divisors is an integer number (228536205).

Almost surely, 2^609429878 is an apocalyptic number.

609429878 is a deficient number, since it is larger than the sum of its proper divisors (304714942).

609429878 is a wasteful number, since it uses less digits than its factorization.

609429878 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 304714941.

The product of its (nonzero) digits is 1741824, while the sum is 53.

The square root of 609429878 is about 24686.6335898599. The cubic root of 609429878 is about 847.8283099590.

The spelling of 609429878 in words is "six hundred nine million, four hundred twenty-nine thousand, eight hundred seventy-eight".