172639095 has 16 divisors (see below), whose sum is σ = 279720960. Its totient is φ = 90908064.

The previous prime is 172639091. The next prime is 172639121. The reversal of 172639095 is 590936271.

172639095 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 172639095 - 2² = 172639091 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (172639091) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 71659 + ... + 74028.

It is an arithmetic number, because the mean of its divisors is an integer number (17482560).

Almost surely, 2^172639095 is an apocalyptic number.

172639095 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

172639095 is a deficient number, since it is larger than the sum of its proper divisors (107081865).

172639095 is a wasteful number, since it uses less digits than its factorization.

172639095 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 145774.

The product of its (nonzero) digits is 102060, while the sum is 42.

The square root of 172639095 is about 13139.2197256915. The cubic root of 172639095 is about 556.8177232775.

The spelling of 172639095 in words is "one hundred seventy-two million, six hundred thirty-nine thousand, ninety-five".