83953693 has 4 divisors (see below), whose sum is σ = 84085308. Its totient is φ = 83822080.

The previous prime is 83953687. The next prime is 83953697. The reversal of 83953693 is 39635938.

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

It can be written as a sum of positive squares in 2 ways, for example, as 76352644 + 7601049 = 8738^2 + 2757^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-83953693 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 (83953697) 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, 64846 + ... + 66127.

It is an arithmetic number, because the mean of its divisors is an integer number (21021327).

Almost surely, 2^83953693 is an apocalyptic number.

It is an amenable number.

83953693 is a deficient number, since it is larger than the sum of its proper divisors (131615).

83953693 is a wasteful number, since it uses less digits than its factorization.

83953693 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 131614.

The product of its digits is 524880, while the sum is 46.

The square root of 83953693 is about 9162.6247876905. The cubic root of 83953693 is about 437.8714220559.

The spelling of 83953693 in words is "eighty-three million, nine hundred fifty-three thousand, six hundred ninety-three".