173880431 has 2 divisors, whose sum is σ = 173880432. Its totient is φ = 173880430.

The previous prime is 173880407. The next prime is 173880449. The reversal of 173880431 is 134088371.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 173880431 - 2¹⁸ = 173618287 is a prime.

It is a super-2 number, since 2×173880431² = 60468808569491522, which contains 22 as substring.

It is a Sophie Germain prime.

It is a junction number, because it is equal to n+sod(n) for n = 173880391 and 173880400.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (173880481) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 86940215 + 86940216.

It is an arithmetic number, because the mean of its divisors is an integer number (86940216).

Almost surely, 2^173880431 is an apocalyptic number.

173880431 is a deficient number, since it is larger than the sum of its proper divisors (1).

173880431 is an equidigital number, since it uses as much as digits as its factorization.

173880431 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 16128, while the sum is 35.

The square root of 173880431 is about 13186.3729281406. The cubic root of 173880431 is about 558.1491092715.

The spelling of 173880431 in words is "one hundred seventy-three million, eight hundred eighty thousand, four hundred thirty-one".