82451909 has 8 divisors (see below), whose sum is σ = 85236480. Its totient is φ = 79675200.

The previous prime is 82451903. The next prime is 82451933. The reversal of 82451909 is 90915428.

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

It is a cyclic number.

It is not a de Polignac number, because 82451909 - 2¹⁶ = 82386373 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (82451903) 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, 25802 + ... + 28820.

It is an arithmetic number, because the mean of its divisors is an integer number (10654560).

Almost surely, 2^82451909 is an apocalyptic number.

It is an amenable number.

82451909 is a deficient number, since it is larger than the sum of its proper divisors (2784571).

82451909 is a wasteful number, since it uses less digits than its factorization.

82451909 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3931.

The product of its (nonzero) digits is 25920, while the sum is 38.

The square root of 82451909 is about 9080.3033539635. The cubic root of 82451909 is about 435.2447805399.

The spelling of 82451909 in words is "eighty-two million, four hundred fifty-one thousand, nine hundred nine".