82748431 has 4 divisors (see below), whose sum is σ = 83480832. Its totient is φ = 82016032.

The previous prime is 82748429. The next prime is 82748437. The reversal of 82748431 is 13484728.

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

It is a cyclic number.

It is not a de Polignac number, because 82748431 - 2¹ = 82748429 is a prime.

It is a super-2 number, since 2×82748431² = 13694605665923522, 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 (82748437) 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, 366031 + ... + 366256.

It is an arithmetic number, because the mean of its divisors is an integer number (20870208).

Almost surely, 2^82748431 is an apocalyptic number.

82748431 is a deficient number, since it is larger than the sum of its proper divisors (732401).

82748431 is a wasteful number, since it uses less digits than its factorization.

82748431 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 732400.

The product of its digits is 43008, while the sum is 37.

The square root of 82748431 is about 9096.6164588818. The cubic root of 82748431 is about 435.7659136070.

The spelling of 82748431 in words is "eighty-two million, seven hundred forty-eight thousand, four hundred thirty-one".