84381457 has 4 divisors (see below), whose sum is σ = 88050240. Its totient is φ = 80712676.

The previous prime is 84381449. The next prime is 84381463. The reversal of 84381457 is 75418348.

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.

It is a cyclic number.

It is not a de Polignac number, because 84381457 - 2³ = 84381449 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (84381487) 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, 1834357 + ... + 1834402.

It is an arithmetic number, because the mean of its divisors is an integer number (22012560).

Almost surely, 2^84381457 is an apocalyptic number.

It is an amenable number.

84381457 is a deficient number, since it is larger than the sum of its proper divisors (3668783).

84381457 is a wasteful number, since it uses less digits than its factorization.

84381457 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3668782.

The product of its digits is 107520, while the sum is 40.

The square root of 84381457 is about 9185.9380032744. The cubic root of 84381457 is about 438.6138488214.

The spelling of 84381457 in words is "eighty-four million, three hundred eighty-one thousand, four hundred fifty-seven".