84185401 has 2 divisors, whose sum is σ = 84185402. Its totient is φ = 84185400.

The previous prime is 84185393. The next prime is 84185407. The reversal of 84185401 is 10458148.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 73616400 + 10569001 = 8580^2 + 3251^2 .

It is a cyclic number.

It is not a de Polignac number, because 84185401 - 2³ = 84185393 is a prime.

It is not a weakly prime, because it can be changed into another prime (84185407) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 42092700 + 42092701.

It is an arithmetic number, because the mean of its divisors is an integer number (42092701).

Almost surely, 2^84185401 is an apocalyptic number.

It is an amenable number.

84185401 is a deficient number, since it is larger than the sum of its proper divisors (1).

84185401 is an equidigital number, since it uses as much as digits as its factorization.

84185401 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 5120, while the sum is 31.

The square root of 84185401 is about 9175.2602687880. The cubic root of 84185401 is about 438.2738864413.

The spelling of 84185401 in words is "eighty-four million, one hundred eighty-five thousand, four hundred one".