612999387 has 128 divisors (see below), whose sum is σ = 1254328320. Its totient is φ = 285534720.

The previous prime is 612999371. The next prime is 612999403. The reversal of 612999387 is 783999216.

It is an interprime number because it is at equal distance from previous prime (612999371) and next prime (612999403).

It is not a de Polignac number, because 612999387 - 2⁴ = 612999371 is a prime.

It is not an unprimeable number, because it can be changed into a prime (612999307) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 127 ways as a sum of consecutive naturals, for example, 999693 + ... + 1000305.

It is an arithmetic number, because the mean of its divisors is an integer number (9799440).

Almost surely, 2^612999387 is an apocalyptic number.

612999387 is an abundant number, since it is smaller than the sum of its proper divisors (641328933).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

612999387 is a wasteful number, since it uses less digits than its factorization.

612999387 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 690 (or 684 counting only the distinct ones).

The product of its digits is 1469664, while the sum is 54.

The square root of 612999387 is about 24758.8244268584. The cubic root of 612999387 is about 849.4803684416.

It can be divided in two parts, 612 and 999387, that added together give a palindrome (999999).

The spelling of 612999387 in words is "six hundred twelve million, nine hundred ninety-nine thousand, three hundred eighty-seven".