172152997 has 2 divisors, whose sum is σ = 172152998. Its totient is φ = 172152996.

The previous prime is 172152991. The next prime is 172153043. The reversal of 172152997 is 799251271.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 156400036 + 15752961 = 12506^2 + 3969^2 .

It is a cyclic number.

It is not a de Polignac number, because 172152997 - 2³ = 172152989 is a prime.

It is equal to p_9616786 and since 172152997 and 9616786 have the same sum of digits, it is a Honaker prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (172152991) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 86076498 + 86076499.

It is an arithmetic number, because the mean of its divisors is an integer number (86076499).

Almost surely, 2^172152997 is an apocalyptic number.

It is an amenable number.

172152997 is a deficient number, since it is larger than the sum of its proper divisors (1).

172152997 is an equidigital number, since it uses as much as digits as its factorization.

172152997 is an evil number, because the sum of its binary digits is even.

The product of its digits is 79380, while the sum is 43.

The square root of 172152997 is about 13120.7087079929. The cubic root of 172152997 is about 556.2946234958.

The spelling of 172152997 in words is "one hundred seventy-two million, one hundred fifty-two thousand, nine hundred ninety-seven".