382720681 has 4 divisors (see below), whose sum is σ = 437395072. Its totient is φ = 328046292.

The previous prime is 382720661. The next prime is 382720693. The reversal of 382720681 is 186027283.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 186027283 = 13 ⋅14309791.

It is not a de Polignac number, because 382720681 - 2¹³ = 382712489 is a prime.

It is a super-2 number, since 2×382720681² = 292950239330207522, which contains 22 as substring.

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 382720681.

It is not an unprimeable number, because it can be changed into a prime (382720661) 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, 27337185 + ... + 27337198.

It is an arithmetic number, because the mean of its divisors is an integer number (109348768).

Almost surely, 2^382720681 is an apocalyptic number.

It is an amenable number.

382720681 is a deficient number, since it is larger than the sum of its proper divisors (54674391).

382720681 is an equidigital number, since it uses as much as digits as its factorization.

382720681 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 54674390.

The product of its (nonzero) digits is 32256, while the sum is 37.

The square root of 382720681 is about 19563.2482221128. The cubic root of 382720681 is about 726.0401596021.

The spelling of 382720681 in words is "three hundred eighty-two million, seven hundred twenty thousand, six hundred eighty-one".