187039093 has 2 divisors, whose sum is σ = 187039094. Its totient is φ = 187039092.

The previous prime is 187039087. The next prime is 187039133. The reversal of 187039093 is 390930781.

It is an a-pointer prime, because the next prime (187039133) can be obtained adding 187039093 to its sum of digits (40).

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 99560484 + 87478609 = 9978^2 + 9353^2 .

It is a cyclic number.

It is not a de Polignac number, because 187039093 - 2⁹ = 187038581 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (187039493) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 93519546 + 93519547.

It is an arithmetic number, because the mean of its divisors is an integer number (93519547).

Almost surely, 2^187039093 is an apocalyptic number.

It is an amenable number.

187039093 is a deficient number, since it is larger than the sum of its proper divisors (1).

187039093 is an equidigital number, since it uses as much as digits as its factorization.

187039093 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 40824, while the sum is 40.

The square root of 187039093 is about 13676.2236381247. The cubic root of 187039093 is about 571.8877526415.

The spelling of 187039093 in words is "one hundred eighty-seven million, thirty-nine thousand, ninety-three".