613977405 has 8 divisors (see below), whose sum is σ = 982363872. Its totient is φ = 327454608.

The previous prime is 613977401. The next prime is 613977431. The reversal of 613977405 is 504779316.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 613977405 - 2² = 613977401 is a prime.

It is a Smith number, since the sum of its digits (42) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (613977401) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 20465899 + ... + 20465928.

It is an arithmetic number, because the mean of its divisors is an integer number (122795484).

Almost surely, 2^613977405 is an apocalyptic number.

It is an amenable number.

613977405 is a deficient number, since it is larger than the sum of its proper divisors (368386467).

613977405 is a wasteful number, since it uses less digits than its factorization.

613977405 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 40931835.

The product of its (nonzero) digits is 158760, while the sum is 42.

The square root of 613977405 is about 24778.5674525385. The cubic root of 613977405 is about 849.9318999651.

The spelling of 613977405 in words is "six hundred thirteen million, nine hundred seventy-seven thousand, four hundred five".