82720293 has 8 divisors (see below), whose sum is σ = 110341056. Its totient is φ = 55123200.

The previous prime is 82720291. The next prime is 82720321. The reversal of 82720293 is 39202728.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 82720293 - 2¹ = 82720291 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (82720291) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5253 + ... + 13893.

It is an arithmetic number, because the mean of its divisors is an integer number (13792632).

Almost surely, 2^82720293 is an apocalyptic number.

It is an amenable number.

82720293 is a deficient number, since it is larger than the sum of its proper divisors (27620763).

82720293 is a wasteful number, since it uses less digits than its factorization.

82720293 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11835.

The product of its (nonzero) digits is 12096, while the sum is 33.

The square root of 82720293 is about 9095.0697083640. The cubic root of 82720293 is about 435.7165150012.

The spelling of 82720293 in words is "eighty-two million, seven hundred twenty thousand, two hundred ninety-three".