172254091 has 2 divisors, whose sum is σ = 172254092. Its totient is φ = 172254090.

The previous prime is 172254083. The next prime is 172254109. The reversal of 172254091 is 190452271.

Together with next prime (172254109) it forms an Ormiston pair, because they use the same digits, order apart.

It is a weak prime.

It is an emirp because it is prime and its reverse (190452271) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 172254091 - 2³ = 172254083 is a prime.

It is a super-3 number, since 3×172254091³ (a number of 26 digits) contains 333 as substring.

It is not a weakly prime, because it can be changed into another prime (172254391) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 86127045 + 86127046.

It is an arithmetic number, because the mean of its divisors is an integer number (86127046).

Almost surely, 2^172254091 is an apocalyptic number.

172254091 is a deficient number, since it is larger than the sum of its proper divisors (1).

172254091 is an equidigital number, since it uses as much as digits as its factorization.

172254091 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 5040, while the sum is 31.

The square root of 172254091 is about 13124.5606021687. The cubic root of 172254091 is about 556.4034937933.

It can be divided in two parts, 17225 and 4091, that added together give a square (21316 = 146²).

The spelling of 172254091 in words is "one hundred seventy-two million, two hundred fifty-four thousand, ninety-one".