84012919 has 2 divisors, whose sum is σ = 84012920. Its totient is φ = 84012918.

The previous prime is 84012899. The next prime is 84012937. The reversal of 84012919 is 91921048.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 84012919 - 2⁹ = 84012407 is a prime.

It is a super-2 number, since 2×84012919² = 14116341117801122, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (84012959) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 42006459 + 42006460.

It is an arithmetic number, because the mean of its divisors is an integer number (42006460).

Almost surely, 2^84012919 is an apocalyptic number.

84012919 is a deficient number, since it is larger than the sum of its proper divisors (1).

84012919 is an equidigital number, since it uses as much as digits as its factorization.

84012919 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 5184, while the sum is 34.

The square root of 84012919 is about 9165.8561520460. The cubic root of 84012919 is about 437.9743648251.

The spelling of 84012919 in words is "eighty-four million, twelve thousand, nine hundred nineteen".