82672069 has 4 divisors (see below), whose sum is σ = 85522860. Its totient is φ = 79821280.

The previous prime is 82672049. The next prime is 82672091. The reversal of 82672069 is 96027628.

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

It can be written as a sum of positive squares in 2 ways, for example, as 29920900 + 52751169 = 5470^2 + 7263^2 .

It is a cyclic number.

It is not a de Polignac number, because 82672069 - 2⁹ = 82671557 is a prime.

It is a super-2 number, since 2×82672069² = 13669341985481522, which contains 22 as substring.

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (82672049) 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, 1425352 + ... + 1425409.

It is an arithmetic number, because the mean of its divisors is an integer number (21380715).

Almost surely, 2^82672069 is an apocalyptic number.

It is an amenable number.

82672069 is a deficient number, since it is larger than the sum of its proper divisors (2850791).

82672069 is a wasteful number, since it uses less digits than its factorization.

82672069 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2850790.

The product of its (nonzero) digits is 72576, while the sum is 40.

The square root of 82672069 is about 9092.4182151945. The cubic root of 82672069 is about 435.6318276895.

The spelling of 82672069 in words is "eighty-two million, six hundred seventy-two thousand, sixty-nine".