172249769357 has 2 divisors, whose sum is σ = 172249769358. Its totient is φ = 172249769356.

The previous prime is 172249769339. The next prime is 172249769359. The reversal of 172249769357 is 753967942271.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 140290698916 + 31959070441 = 374554^2 + 178771^2 .

It is an emirp because it is prime and its reverse (753967942271) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 172249769357 - 2⁸ = 172249769101 is a prime.

Together with 172249769359, it forms a pair of twin primes.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 172249769357.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (172249769359) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 86124884678 + 86124884679.

It is an arithmetic number, because the mean of its divisors is an integer number (86124884679).

Almost surely, 2^172249769357 is an apocalyptic number.

It is an amenable number.

172249769357 is a deficient number, since it is larger than the sum of its proper divisors (1).

172249769357 is an equidigital number, since it uses as much as digits as its factorization.

172249769357 is an evil number, because the sum of its binary digits is even.

The product of its digits is 40007520, while the sum is 62.

The spelling of 172249769357 in words is "one hundred seventy-two billion, two hundred forty-nine million, seven hundred sixty-nine thousand, three hundred fifty-seven".