73780347 has 4 divisors (see below), whose sum is σ = 98373800. Its totient is φ = 49186896.

The previous prime is 73780339. The next prime is 73780349. The reversal of 73780347 is 74308737.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 74308737 = 3 ⋅24769579.

It is not a de Polignac number, because 73780347 - 2³ = 73780339 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (73780349) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 12296722 + ... + 12296727.

It is an arithmetic number, because the mean of its divisors is an integer number (24593450).

Almost surely, 2^73780347 is an apocalyptic number.

73780347 is a deficient number, since it is larger than the sum of its proper divisors (24593453).

73780347 is a wasteful number, since it uses less digits than its factorization.

73780347 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24593452.

The product of its (nonzero) digits is 98784, while the sum is 39.

The square root of 73780347 is about 8589.5487075864. The cubic root of 73780347 is about 419.4178385644.

The spelling of 73780347 in words is "seventy-three million, seven hundred eighty thousand, three hundred forty-seven".