172926473 has 2 divisors, whose sum is σ = 172926474. Its totient is φ = 172926472.

The previous prime is 172926437. The next prime is 172926487. The reversal of 172926473 is 374629271.

Together with previous prime (172926437) it forms an Ormiston pair, because they use the same digits, order apart.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 171295744 + 1630729 = 13088^2 + 1277^2 .

It is a cyclic number.

It is not a de Polignac number, because 172926473 - 2¹⁶ = 172860937 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 172926473.

It is not a weakly prime, because it can be changed into another prime (172926073) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 86463236 + 86463237.

It is an arithmetic number, because the mean of its divisors is an integer number (86463237).

Almost surely, 2^172926473 is an apocalyptic number.

It is an amenable number.

172926473 is a deficient number, since it is larger than the sum of its proper divisors (1).

172926473 is an equidigital number, since it uses as much as digits as its factorization.

172926473 is an evil number, because the sum of its binary digits is even.

The product of its digits is 127008, while the sum is 41.

The square root of 172926473 is about 13150.1510637711. The cubic root of 172926473 is about 557.1265147800.

The spelling of 172926473 in words is "one hundred seventy-two million, nine hundred twenty-six thousand, four hundred seventy-three".