82709745 has 16 divisors (see below), whose sum is σ = 133552320. Its totient is φ = 43706304.

The previous prime is 82709741. The next prime is 82709819. The reversal of 82709745 is 54790728.

It is not a de Polignac number, because 82709745 - 2² = 82709741 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 82709697 and 82709706.

It is not an unprimeable number, because it can be changed into a prime (82709741) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 23659 + ... + 26928.

It is an arithmetic number, because the mean of its divisors is an integer number (8347020).

Almost surely, 2^82709745 is an apocalyptic number.

It is an amenable number.

82709745 is a deficient number, since it is larger than the sum of its proper divisors (50842575).

82709745 is a wasteful number, since it uses less digits than its factorization.

82709745 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 50704.

The product of its (nonzero) digits is 141120, while the sum is 42.

The square root of 82709745 is about 9094.4898152673. The cubic root of 82709745 is about 435.6979942207.

The spelling of 82709745 in words is "eighty-two million, seven hundred nine thousand, seven hundred forty-five".