83727381 has 4 divisors (see below), whose sum is σ = 111636512. Its totient is φ = 55818252.

The previous prime is 83727349. The next prime is 83727451. The reversal of 83727381 is 18372738.

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 not a de Polignac number, because 83727381 - 2⁵ = 83727349 is a prime.

It is a super-2 number, since 2×83727381² = 14020548658238322, 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 (83727331) 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, 13954561 + ... + 13954566.

It is an arithmetic number, because the mean of its divisors is an integer number (27909128).

Almost surely, 2^83727381 is an apocalyptic number.

It is an amenable number.

83727381 is a deficient number, since it is larger than the sum of its proper divisors (27909131).

83727381 is a wasteful number, since it uses less digits than its factorization.

83727381 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27909130.

The product of its digits is 56448, while the sum is 39.

The square root of 83727381 is about 9150.2667174241. The cubic root of 83727381 is about 437.4776147458.

It can be divided in two parts, 8372 and 7381, that added together give a triangular number (15753 = T₁₇₇).

The spelling of 83727381 in words is "eighty-three million, seven hundred twenty-seven thousand, three hundred eighty-one".