84274381 has 2 divisors, whose sum is σ = 84274382. Its totient is φ = 84274380.

The previous prime is 84274343. The next prime is 84274387. The reversal of 84274381 is 18347248.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 62568100 + 21706281 = 7910^2 + 4659^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-84274381 is a prime.

It is a super-2 number, since 2×84274381² = 14204342585866322, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 84274381.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (84274387) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 42137190 + 42137191.

It is an arithmetic number, because the mean of its divisors is an integer number (42137191).

Almost surely, 2^84274381 is an apocalyptic number.

It is an amenable number.

84274381 is a deficient number, since it is larger than the sum of its proper divisors (1).

84274381 is an equidigital number, since it uses as much as digits as its factorization.

84274381 is an evil number, because the sum of its binary digits is even.

The product of its digits is 43008, while the sum is 37.

The square root of 84274381 is about 9180.1078969694. The cubic root of 84274381 is about 438.4282436833.

The spelling of 84274381 in words is "eighty-four million, two hundred seventy-four thousand, three hundred eighty-one".