188085407 has 2 divisors, whose sum is σ = 188085408. Its totient is φ = 188085406.

The previous prime is 188085379. The next prime is 188085413. The reversal of 188085407 is 704580881.

It is a strong prime.

It is an emirp because it is prime and its reverse (704580881) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 188085407 - 2⁶ = 188085343 is a prime.

It is a super-2 number, since 2×188085407² = 70752240652711298, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (188085307) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 94042703 + 94042704.

It is an arithmetic number, because the mean of its divisors is an integer number (94042704).

Almost surely, 2^188085407 is an apocalyptic number.

188085407 is a deficient number, since it is larger than the sum of its proper divisors (1).

188085407 is an equidigital number, since it uses as much as digits as its factorization.

188085407 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 71680, while the sum is 41.

The square root of 188085407 is about 13714.4233199942. The cubic root of 188085407 is about 572.9521679649.

The spelling of 188085407 in words is "one hundred eighty-eight million, eighty-five thousand, four hundred seven".