67763981 has 8 divisors (see below), whose sum is σ = 70302720. Its totient is φ = 65238768.

The previous prime is 67763963. The next prime is 67763999. The reversal of 67763981 is 18936776.

It is an interprime number because it is at equal distance from previous prime (67763963) and next prime (67763999).

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 67763981 - 2¹⁰ = 67762957 is a prime.

It is a super-2 number, since 2×67763981² = 9183914241936722, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (67763951) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7460 + ... + 13826.

It is an arithmetic number, because the mean of its divisors is an integer number (8787840).

Almost surely, 2^67763981 is an apocalyptic number.

It is an amenable number.

67763981 is a deficient number, since it is larger than the sum of its proper divisors (2538739).

67763981 is a wasteful number, since it uses less digits than its factorization.

67763981 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6763.

The product of its digits is 381024, while the sum is 47.

The square root of 67763981 is about 8231.8880580338. Note that the first 3 decimals coincide. The cubic root of 67763981 is about 407.6927332991.

The spelling of 67763981 in words is "sixty-seven million, seven hundred sixty-three thousand, nine hundred eighty-one".