172442077 has 2 divisors, whose sum is σ = 172442078. Its totient is φ = 172442076.

The previous prime is 172442009. The next prime is 172442093. The reversal of 172442077 is 770244271.

It is a happy number.

172442077 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 111070521 + 61371556 = 10539^2 + 7834^2 .

It is a cyclic number.

It is not a de Polignac number, because 172442077 - 2¹⁵ = 172409309 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (172448077) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 86221038 + 86221039.

It is an arithmetic number, because the mean of its divisors is an integer number (86221039).

Almost surely, 2^172442077 is an apocalyptic number.

It is an amenable number.

172442077 is a deficient number, since it is larger than the sum of its proper divisors (1).

172442077 is an equidigital number, since it uses as much as digits as its factorization.

172442077 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 21952, while the sum is 34.

The square root of 172442077 is about 13131.7202604990. The cubic root of 172442077 is about 556.6058267539.

It can be divided in two parts, 17244 and 2077, that added together give a square (19321 = 139²).

The spelling of 172442077 in words is "one hundred seventy-two million, four hundred forty-two thousand, seventy-seven".