82749457 has 4 divisors (see below), whose sum is σ = 94570816. Its totient is φ = 70928100.

The previous prime is 82749449. The next prime is 82749461. The reversal of 82749457 is 75494728.

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 82749457 - 2³ = 82749449 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (82749467) 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, 5910669 + ... + 5910682.

It is an arithmetic number, because the mean of its divisors is an integer number (23642704).

Almost surely, 2^82749457 is an apocalyptic number.

It is an amenable number.

82749457 is a deficient number, since it is larger than the sum of its proper divisors (11821359).

82749457 is a wasteful number, since it uses less digits than its factorization.

82749457 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11821358.

The product of its digits is 564480, while the sum is 46.

The square root of 82749457 is about 9096.6728533019. The cubic root of 82749457 is about 435.7677146239.

The spelling of 82749457 in words is "eighty-two million, seven hundred forty-nine thousand, four hundred fifty-seven".