73780643 has 8 divisors (see below), whose sum is σ = 74400000. Its totient is φ = 73164168.

The previous prime is 73780633. The next prime is 73780649. The reversal of 73780643 is 34608737.

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 73780643 - 2⁸ = 73780387 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 73780597 and 73780606.

It is not an unprimeable number, because it can be changed into a prime (73780649) 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, 98930 + ... + 99672.

It is an arithmetic number, because the mean of its divisors is an integer number (9300000).

Almost surely, 2^73780643 is an apocalyptic number.

73780643 is a deficient number, since it is larger than the sum of its proper divisors (619357).

73780643 is a wasteful number, since it uses less digits than its factorization.

73780643 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1441.

The product of its (nonzero) digits is 84672, while the sum is 38.

The square root of 73780643 is about 8589.5659378108. The cubic root of 73780643 is about 419.4183994523.

The spelling of 73780643 in words is "seventy-three million, seven hundred eighty thousand, six hundred forty-three".