172057619 has 2 divisors, whose sum is σ = 172057620. Its totient is φ = 172057618.

The previous prime is 172057591. The next prime is 172057621. The reversal of 172057619 is 916750271.

It is a strong prime.

It is an emirp because it is prime and its reverse (916750271) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 172057619 - 2¹⁶ = 171992083 is a prime.

It is a super-2 number, since 2×172057619² = 59207648511898322, which contains 22 as substring.

Together with 172057621, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (172057649) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 86028809 + 86028810.

It is an arithmetic number, because the mean of its divisors is an integer number (86028810).

Almost surely, 2^172057619 is an apocalyptic number.

172057619 is a deficient number, since it is larger than the sum of its proper divisors (1).

172057619 is an equidigital number, since it uses as much as digits as its factorization.

172057619 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 26460, while the sum is 38.

The square root of 172057619 is about 13117.0735684451. The cubic root of 172057619 is about 556.1918697996.

The spelling of 172057619 in words is "one hundred seventy-two million, fifty-seven thousand, six hundred nineteen".