73916781 has 8 divisors (see below), whose sum is σ = 98671104. Its totient is φ = 49220160.

The previous prime is 73916771. The next prime is 73916827. The reversal of 73916781 is 18761937.

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

It is not a de Polignac number, because 73916781 - 2⁷ = 73916653 is a prime.

It is a super-2 number, since 2×73916781² = 10927381026803922, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (73916761) 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, 11341 + ... + 16626.

It is an arithmetic number, because the mean of its divisors is an integer number (12333888).

Almost surely, 2^73916781 is an apocalyptic number.

It is an amenable number.

73916781 is a deficient number, since it is larger than the sum of its proper divisors (24754323).

73916781 is a wasteful number, since it uses less digits than its factorization.

73916781 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28851.

The product of its digits is 63504, while the sum is 42.

The square root of 73916781 is about 8597.4869002517. The cubic root of 73916781 is about 419.6762073572.

The spelling of 73916781 in words is "seventy-three million, nine hundred sixteen thousand, seven hundred eighty-one".