86874421 has 2 divisors, whose sum is σ = 86874422. Its totient is φ = 86874420.

The previous prime is 86874419. The next prime is 86874457. The reversal of 86874421 is 12447868.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 50211396 + 36663025 = 7086^2 + 6055^2 .

It is a cyclic number.

It is not a de Polignac number, because 86874421 - 2¹ = 86874419 is a prime.

Together with 86874419, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (86872421) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 43437210 + 43437211.

It is an arithmetic number, because the mean of its divisors is an integer number (43437211).

Almost surely, 2^86874421 is an apocalyptic number.

It is an amenable number.

86874421 is a deficient number, since it is larger than the sum of its proper divisors (1).

86874421 is an equidigital number, since it uses as much as digits as its factorization.

86874421 is an evil number, because the sum of its binary digits is even.

The product of its digits is 86016, while the sum is 40.

The square root of 86874421 is about 9320.6448811228. The cubic root of 86874421 is about 442.8914616039.

The spelling of 86874421 in words is "eighty-six million, eight hundred seventy-four thousand, four hundred twenty-one".