84487451 has 2 divisors, whose sum is σ = 84487452. Its totient is φ = 84487450.

The previous prime is 84487439. The next prime is 84487453. The reversal of 84487451 is 15478448.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-84487451 is a prime.

Together with 84487453, it forms a pair of twin primes.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 84487399 and 84487408.

It is not a weakly prime, because it can be changed into another prime (84487453) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 42243725 + 42243726.

It is an arithmetic number, because the mean of its divisors is an integer number (42243726).

Almost surely, 2^84487451 is an apocalyptic number.

84487451 is a deficient number, since it is larger than the sum of its proper divisors (1).

84487451 is an equidigital number, since it uses as much as digits as its factorization.

84487451 is an evil number, because the sum of its binary digits is even.

The product of its digits is 143360, while the sum is 41.

The square root of 84487451 is about 9191.7055544659. The cubic root of 84487451 is about 438.7974238449.

The spelling of 84487451 in words is "eighty-four million, four hundred eighty-seven thousand, four hundred fifty-one".