67473981 has 12 divisors (see below), whose sum is σ = 100823580. Its totient is φ = 43431360.

The previous prime is 67473971. The next prime is 67473983. The reversal of 67473981 is 18937476.

It can be written as a sum of positive squares in 2 ways, for example, as 11088900 + 56385081 = 3330^2 + 7509^2 .

It is not a de Polignac number, because 67473981 - 2¹¹ = 67471933 is a prime.

It is a super-2 number, since 2×67473981² = 9105476223976722, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (67473983) 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 in 11 ways as a sum of consecutive naturals, for example, 129000 + ... + 129521.

It is an arithmetic number, because the mean of its divisors is an integer number (8401965).

Almost surely, 2^67473981 is an apocalyptic number.

It is an amenable number.

67473981 is a deficient number, since it is larger than the sum of its proper divisors (33349599).

67473981 is a wasteful number, since it uses less digits than its factorization.

67473981 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 258556 (or 258553 counting only the distinct ones).

The product of its digits is 254016, while the sum is 45.

The square root of 67473981 is about 8214.2547440410. The cubic root of 67473981 is about 407.1103198903.

The spelling of 67473981 in words is "sixty-seven million, four hundred seventy-three thousand, nine hundred eighty-one".