173478401 has 2 divisors, whose sum is σ = 173478402. Its totient is φ = 173478400.

The previous prime is 173478367. The next prime is 173478407. The reversal of 173478401 is 104874371.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 145926400 + 27552001 = 12080^2 + 5249^2 .

It is a cyclic number.

It is not a de Polignac number, because 173478401 - 2⁶ = 173478337 is a prime.

It is a super-2 number, since 2×173478401² = 60189511227033602, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (173478407) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 86739200 + 86739201.

It is an arithmetic number, because the mean of its divisors is an integer number (86739201).

Almost surely, 2^173478401 is an apocalyptic number.

It is an amenable number.

173478401 is a deficient number, since it is larger than the sum of its proper divisors (1).

173478401 is an equidigital number, since it uses as much as digits as its factorization.

173478401 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 18816, while the sum is 35.

The square root of 173478401 is about 13171.1199599730. The cubic root of 173478401 is about 557.7186106669.

The spelling of 173478401 in words is "one hundred seventy-three million, four hundred seventy-eight thousand, four hundred one".