172681039 has 2 divisors, whose sum is σ = 172681040. Its totient is φ = 172681038.

The previous prime is 172681021. The next prime is 172681073. The reversal of 172681039 is 930186271.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 172681039 - 2¹¹ = 172678991 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 172680989 and 172681007.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (172681339) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 86340519 + 86340520.

It is an arithmetic number, because the mean of its divisors is an integer number (86340520).

Almost surely, 2^172681039 is an apocalyptic number.

172681039 is a deficient number, since it is larger than the sum of its proper divisors (1).

172681039 is an equidigital number, since it uses as much as digits as its factorization.

172681039 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 18144, while the sum is 37.

The square root of 172681039 is about 13140.8157661539. The cubic root of 172681039 is about 556.8628140132.

The spelling of 172681039 in words is "one hundred seventy-two million, six hundred eighty-one thousand, thirty-nine".