613839887 has 4 divisors (see below), whose sum is σ = 613923216. Its totient is φ = 613756560.

The previous prime is 613839869. The next prime is 613839901. The reversal of 613839887 is 788938316.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 613839887 - 2¹⁶ = 613774351 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 (613839817) 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, 29414 + ... + 45747.

It is an arithmetic number, because the mean of its divisors is an integer number (153480804).

Almost surely, 2^613839887 is an apocalyptic number.

613839887 is a deficient number, since it is larger than the sum of its proper divisors (83329).

613839887 is an equidigital number, since it uses as much as digits as its factorization.

613839887 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 83328.

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

The square root of 613839887 is about 24775.7923586714. The cubic root of 613839887 is about 849.8684396155.

The spelling of 613839887 in words is "six hundred thirteen million, eight hundred thirty-nine thousand, eight hundred eighty-seven".