609728377 has 4 divisors (see below), whose sum is σ = 621232740. Its totient is φ = 598224016.

The previous prime is 609728369. The next prime is 609728387. The reversal of 609728377 is 773827906.

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 336685801 + 273042576 = 18349^2 + 16524^2 .

It is a cyclic number.

It is not a de Polignac number, because 609728377 - 2³ = 609728369 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 609728377.

It is not an unprimeable number, because it can be changed into a prime (609728387) 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, 5752102 + ... + 5752207.

It is an arithmetic number, because the mean of its divisors is an integer number (155308185).

Almost surely, 2^609728377 is an apocalyptic number.

It is an amenable number.

609728377 is a deficient number, since it is larger than the sum of its proper divisors (11504363).

609728377 is a wasteful number, since it uses less digits than its factorization.

609728377 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11504362.

The product of its (nonzero) digits is 889056, while the sum is 49.

The square root of 609728377 is about 24692.6786112807. The cubic root of 609728377 is about 847.9667095815.

The spelling of 609728377 in words is "six hundred nine million, seven hundred twenty-eight thousand, three hundred seventy-seven".