187222493 has 2 divisors, whose sum is σ = 187222494. Its totient is φ = 187222492.

The previous prime is 187222471. The next prime is 187222571. The reversal of 187222493 is 394222781.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 110712484 + 76510009 = 10522^2 + 8747^2 .

It is a cyclic number.

It is not a de Polignac number, because 187222493 - 2¹² = 187218397 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (187222403) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 93611246 + 93611247.

It is an arithmetic number, because the mean of its divisors is an integer number (93611247).

Almost surely, 2^187222493 is an apocalyptic number.

It is an amenable number.

187222493 is a deficient number, since it is larger than the sum of its proper divisors (1).

187222493 is an equidigital number, since it uses as much as digits as its factorization.

187222493 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 48384, while the sum is 38.

The square root of 187222493 is about 13682.9270625842. The cubic root of 187222493 is about 572.0746118868.

The spelling of 187222493 in words is "one hundred eighty-seven million, two hundred twenty-two thousand, four hundred ninety-three".