67293981 has 6 divisors (see below), whose sum is σ = 97202430. Its totient is φ = 44862648.

The previous prime is 67293959. The next prime is 67293983. The reversal of 67293981 is 18939276.

It can be written as a sum of positive squares in only one way, i.e., 34047225 + 33246756 = 5835^2 + 5766^2 .

It is not a de Polignac number, because 67293981 - 2²⁵ = 33739549 is a prime.

It is a super-2 number, since 2×67293981² = 9056959757656722, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (67293983) 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 5 ways as a sum of consecutive naturals, for example, 3738546 + ... + 3738563.

It is an arithmetic number, because the mean of its divisors is an integer number (16200405).

Almost surely, 2^67293981 is an apocalyptic number.

It is an amenable number.

67293981 is a deficient number, since it is larger than the sum of its proper divisors (29908449).

67293981 is a wasteful number, since it uses less digits than its factorization.

67293981 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7477115 (or 7477112 counting only the distinct ones).

The product of its digits is 163296, while the sum is 45.

The square root of 67293981 is about 8203.2908640374. The cubic root of 67293981 is about 406.7479821120.

The spelling of 67293981 in words is "sixty-seven million, two hundred ninety-three thousand, nine hundred eighty-one".