172894031 has 2 divisors, whose sum is σ = 172894032. Its totient is φ = 172894030.

The previous prime is 172894021. The next prime is 172894093. The reversal of 172894031 is 130498271.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-172894031 is a prime.

It is a super-2 number, since 2×172894031² = 59784691910857922, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 172893982 and 172894000.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (172894021) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 86447015 + 86447016.

It is an arithmetic number, because the mean of its divisors is an integer number (86447016).

Almost surely, 2^172894031 is an apocalyptic number.

172894031 is a deficient number, since it is larger than the sum of its proper divisors (1).

172894031 is an equidigital number, since it uses as much as digits as its factorization.

172894031 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 12096, while the sum is 35.

The square root of 172894031 is about 13148.9174839604. The cubic root of 172894031 is about 557.0916725559.

It can be divided in two parts, 1728 and 94031, that added together give a palindrome (95759).

The spelling of 172894031 in words is "one hundred seventy-two million, eight hundred ninety-four thousand, thirty-one".