617478399 has 6 divisors (see below), whose sum is σ = 891913256. Its totient is φ = 411652260.

The previous prime is 617478377. The next prime is 617478419. The reversal of 617478399 is 993874716.

617478399 = 3355² + 3356² + ... + 3408².

It is a happy number.

It is not a de Polignac number, because 617478399 - 2¹² = 617474303 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (617478349) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 34304347 + ... + 34304364.

Almost surely, 2^617478399 is an apocalyptic number.

617478399 is a deficient number, since it is larger than the sum of its proper divisors (274434857).

617478399 is a wasteful number, since it uses less digits than its factorization.

617478399 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 68608717 (or 68608714 counting only the distinct ones).

The product of its digits is 2286144, while the sum is 54.

The square root of 617478399 is about 24849.1126400924. The cubic root of 617478399 is about 851.5443200736.

The spelling of 617478399 in words is "six hundred seventeen million, four hundred seventy-eight thousand, three hundred ninety-nine".