609638401 has 4 divisors (see below), whose sum is σ = 611395632. Its totient is φ = 607881172.

The previous prime is 609638369. The next prime is 609638431. The reversal of 609638401 is 104836906.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 609638401 - 2⁵ = 609638369 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (609638431) 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, 878095 + ... + 878788.

It is an arithmetic number, because the mean of its divisors is an integer number (152848908).

Almost surely, 2^609638401 is an apocalyptic number.

It is an amenable number.

609638401 is a deficient number, since it is larger than the sum of its proper divisors (1757231).

609638401 is a wasteful number, since it uses less digits than its factorization.

609638401 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1757230.

The product of its (nonzero) digits is 31104, while the sum is 37.

The square root of 609638401 is about 24690.8566275048. The cubic root of 609638401 is about 847.9249967966.

The spelling of 609638401 in words is "six hundred nine million, six hundred thirty-eight thousand, four hundred one".