67145431 has 2 divisors, whose sum is σ = 67145432. Its totient is φ = 67145430.

The previous prime is 67145401. The next prime is 67145459. The reversal of 67145431 is 13454176.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 67145431 - 2⁹ = 67144919 is a prime.

It is a super-2 number, since 2×67145431² = 9017017808351522, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 67145393 and 67145402.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (67145401) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 33572715 + 33572716.

It is an arithmetic number, because the mean of its divisors is an integer number (33572716).

Almost surely, 2^67145431 is an apocalyptic number.

67145431 is a deficient number, since it is larger than the sum of its proper divisors (1).

67145431 is an equidigital number, since it uses as much as digits as its factorization.

67145431 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 10080, while the sum is 31.

The square root of 67145431 is about 8194.2315686097. The cubic root of 67145431 is about 406.4484658361.

It can be divided in two parts, 67145 and 431, that added together give a palindrome (67576).

The spelling of 67145431 in words is "sixty-seven million, one hundred forty-five thousand, four hundred thirty-one".