65073981 has 16 divisors (see below), whose sum is σ = 100073600. Its totient is φ = 36842688.

The previous prime is 65073979. The next prime is 65074027. The reversal of 65073981 is 18937056.

It is not a de Polignac number, because 65073981 - 2¹ = 65073979 is a prime.

It is a super-2 number, since 2×65073981² = 8469246006376722, 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 (65073901) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 11926 + ... + 16503.

It is an arithmetic number, because the mean of its divisors is an integer number (6254600).

Almost surely, 2^65073981 is an apocalyptic number.

It is an amenable number.

65073981 is a deficient number, since it is larger than the sum of its proper divisors (34999619).

65073981 is a wasteful number, since it uses less digits than its factorization.

65073981 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28548.

The product of its (nonzero) digits is 45360, while the sum is 39.

The square root of 65073981 is about 8066.8445503803. The cubic root of 65073981 is about 402.2250602340.

The spelling of 65073981 in words is "sixty-five million, seventy-three thousand, nine hundred eighty-one".