172354694249 has 2 divisors, whose sum is σ = 172354694250. Its totient is φ = 172354694248.

The previous prime is 172354694227. The next prime is 172354694263. The reversal of 172354694249 is 942496453271.

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., 124233691024 + 48121003225 = 352468^2 + 219365^2 .

It is a cyclic number.

It is not a de Polignac number, because 172354694249 - 2⁸ = 172354693993 is a prime.

It is a super-2 number, since 2×172354694249² (a number of 23 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 172354694194 and 172354694203.

It is not a weakly prime, because it can be changed into another prime (172354694299) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 86177347124 + 86177347125.

It is an arithmetic number, because the mean of its divisors is an integer number (86177347125).

Almost surely, 2^172354694249 is an apocalyptic number.

It is an amenable number.

172354694249 is a deficient number, since it is larger than the sum of its proper divisors (1).

172354694249 is an equidigital number, since it uses as much as digits as its factorization.

172354694249 is an evil number, because the sum of its binary digits is even.

The product of its digits is 13063680, while the sum is 56.

The spelling of 172354694249 in words is "one hundred seventy-two billion, three hundred fifty-four million, six hundred ninety-four thousand, two hundred forty-nine".