613781969 has 4 divisors (see below), whose sum is σ = 615108096. Its totient is φ = 612455844.

The previous prime is 613781921. The next prime is 613781981. The reversal of 613781969 is 969187316.

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 613781969 - 2⁸ = 613781713 is a prime.

It is a super-2 number, since 2×613781969² = 753456610939033922, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (613781569) 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 3 ways as a sum of consecutive naturals, for example, 662369 + ... + 663294.

It is an arithmetic number, because the mean of its divisors is an integer number (153777024).

Almost surely, 2^613781969 is an apocalyptic number.

It is an amenable number.

613781969 is a deficient number, since it is larger than the sum of its proper divisors (1326127).

613781969 is a wasteful number, since it uses less digits than its factorization.

613781969 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1326126.

The product of its digits is 489888, while the sum is 50.

The square root of 613781969 is about 24774.6234885618. The cubic root of 613781969 is about 849.8417093939.

The spelling of 613781969 in words is "six hundred thirteen million, seven hundred eighty-one thousand, nine hundred sixty-nine".