19142237 has 2 divisors, whose sum is σ = 19142238. Its totient is φ = 19142236.

The previous prime is 19142219. The next prime is 19142251. The reversal of 19142237 is 73224191.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 15413476 + 3728761 = 3926^2 + 1931^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-19142237 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (19142257) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9571118 + 9571119.

It is an arithmetic number, because the mean of its divisors is an integer number (9571119).

Almost surely, 2^19142237 is an apocalyptic number.

It is an amenable number.

19142237 is a deficient number, since it is larger than the sum of its proper divisors (1).

19142237 is an equidigital number, since it uses as much as digits as its factorization.

19142237 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 3024, while the sum is 29.

The square root of 19142237 is about 4375.1842246927. The cubic root of 19142237 is about 267.5043793501.

The spelling of 19142237 in words is "nineteen million, one hundred forty-two thousand, two hundred thirty-seven".