82730657 has 4 divisors (see below), whose sum is σ = 82752660. Its totient is φ = 82708656.

The previous prime is 82730651. The next prime is 82730663. The reversal of 82730657 is 75603728.

It is a happy number.

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

It is an interprime number because it is at equal distance from previous prime (82730651) and next prime (82730663).

It can be written as a sum of positive squares in 2 ways, for example, as 70627216 + 12103441 = 8404^2 + 3479^2 .

It is a cyclic number.

It is not a de Polignac number, because 82730657 - 2²⁴ = 65953441 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 82730657.

It is not an unprimeable number, because it can be changed into a prime (82730651) 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, 3782 + ... + 13407.

It is an arithmetic number, because the mean of its divisors is an integer number (20688165).

Almost surely, 2^82730657 is an apocalyptic number.

It is an amenable number.

82730657 is a deficient number, since it is larger than the sum of its proper divisors (22003).

82730657 is a wasteful number, since it uses less digits than its factorization.

82730657 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22002.

The product of its (nonzero) digits is 70560, while the sum is 38.

The square root of 82730657 is about 9095.6394497583. The cubic root of 82730657 is about 435.7347111706.

The spelling of 82730657 in words is "eighty-two million, seven hundred thirty thousand, six hundred fifty-seven".