83661269 has 4 divisors (see below), whose sum is σ = 85441344. Its totient is φ = 81881196.

The previous prime is 83661251. The next prime is 83661271. The reversal of 83661269 is 96216638.

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 83661269 - 2⁸ = 83661013 is a prime.

It is a super-2 number, since 2×83661269² = 13998415861380722, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (83661299) 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, 889967 + ... + 890060.

It is an arithmetic number, because the mean of its divisors is an integer number (21360336).

Almost surely, 2^83661269 is an apocalyptic number.

It is an amenable number.

83661269 is a deficient number, since it is larger than the sum of its proper divisors (1780075).

83661269 is a wasteful number, since it uses less digits than its factorization.

83661269 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1780074.

The product of its digits is 93312, while the sum is 41.

The square root of 83661269 is about 9146.6534317203. The cubic root of 83661269 is about 437.3624388198.

The spelling of 83661269 in words is "eighty-three million, six hundred sixty-one thousand, two hundred sixty-nine".