67481431 has 2 divisors, whose sum is σ = 67481432. Its totient is φ = 67481430.

The previous prime is 67481417. The next prime is 67481443. The reversal of 67481431 is 13418476.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 67481431 - 2¹³ = 67473239 is a prime.

It is a super-2 number, since 2×67481431² = 9107487059615522, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (67481731) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 33740715 + 33740716.

It is an arithmetic number, because the mean of its divisors is an integer number (33740716).

Almost surely, 2^67481431 is an apocalyptic number.

67481431 is a deficient number, since it is larger than the sum of its proper divisors (1).

67481431 is an equidigital number, since it uses as much as digits as its factorization.

67481431 is an evil number, because the sum of its binary digits is even.

The product of its digits is 16128, while the sum is 34.

The square root of 67481431 is about 8214.7082114948. The cubic root of 67481431 is about 407.1253027534.

The spelling of 67481431 in words is "sixty-seven million, four hundred eighty-one thousand, four hundred thirty-one".