172190783 has 2 divisors, whose sum is σ = 172190784. Its totient is φ = 172190782.

The previous prime is 172190747. The next prime is 172190797. The reversal of 172190783 is 387091271.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 172190783 - 2¹⁴ = 172174399 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (172190743) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 86095391 + 86095392.

It is an arithmetic number, because the mean of its divisors is an integer number (86095392).

Almost surely, 2^172190783 is an apocalyptic number.

172190783 is a deficient number, since it is larger than the sum of its proper divisors (1).

172190783 is an equidigital number, since it uses as much as digits as its factorization.

172190783 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 21168, while the sum is 38.

The square root of 172190783 is about 13122.1485664505. The cubic root of 172190783 is about 556.3353210367.

The spelling of 172190783 in words is "one hundred seventy-two million, one hundred ninety thousand, seven hundred eighty-three".