190231087 has 2 divisors, whose sum is σ = 190231088. Its totient is φ = 190231086.

The previous prime is 190231061. The next prime is 190231109. The reversal of 190231087 is 780132091.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 190231087 - 2¹⁵ = 190198319 is a prime.

It is a super-2 number, since 2×190231087² = 72375732922403138, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (190231007) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 95115543 + 95115544.

It is an arithmetic number, because the mean of its divisors is an integer number (95115544).

Almost surely, 2^190231087 is an apocalyptic number.

190231087 is a deficient number, since it is larger than the sum of its proper divisors (1).

190231087 is an equidigital number, since it uses as much as digits as its factorization.

190231087 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3024, while the sum is 31.

The square root of 190231087 is about 13792.4286113795. The cubic root of 190231087 is about 575.1226828331.

The spelling of 190231087 in words is "one hundred ninety million, two hundred thirty-one thousand, eighty-seven".