73513973 has 4 divisors (see below), whose sum is σ = 79168908. Its totient is φ = 67859040.

The previous prime is 73513949. The next prime is 73513981. The reversal of 73513973 is 37931537.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 37429924 + 36084049 = 6118^2 + 6007^2 .

It is a cyclic number.

It is not a de Polignac number, because 73513973 - 2¹⁰ = 73512949 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (73513873) 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, 2827448 + ... + 2827473.

It is an arithmetic number, because the mean of its divisors is an integer number (19792227).

Almost surely, 2^73513973 is an apocalyptic number.

It is an amenable number.

73513973 is a deficient number, since it is larger than the sum of its proper divisors (5654935).

73513973 is a wasteful number, since it uses less digits than its factorization.

73513973 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5654934.

The product of its digits is 59535, while the sum is 38.

The square root of 73513973 is about 8574.0289829228. The cubic root of 73513973 is about 418.9124793704.

The spelling of 73513973 in words is "seventy-three million, five hundred thirteen thousand, nine hundred seventy-three".