73941981 has 4 divisors (see below), whose sum is σ = 98589312. Its totient is φ = 49294652.

The previous prime is 73941979. The next prime is 73941991. The reversal of 73941981 is 18914937.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 73941981 - 2¹ = 73941979 is a prime.

It is a super-2 number, since 2×73941981² = 10934833108408722, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (73941991) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 12323661 + ... + 12323666.

It is an arithmetic number, because the mean of its divisors is an integer number (24647328).

Almost surely, 2^73941981 is an apocalyptic number.

It is an amenable number.

73941981 is a deficient number, since it is larger than the sum of its proper divisors (24647331).

73941981 is a wasteful number, since it uses less digits than its factorization.

73941981 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24647330.

The product of its digits is 54432, while the sum is 42.

The square root of 73941981 is about 8598.9523199050. The cubic root of 73941981 is about 419.7238944934.

The spelling of 73941981 in words is "seventy-three million, nine hundred forty-one thousand, nine hundred eighty-one".