73138247 has 8 divisors (see below), whose sum is σ = 90016416. Its totient is φ = 57867552.

The previous prime is 73138243. The next prime is 73138309. The reversal of 73138247 is 74283137.

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 73138247 - 2² = 73138243 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (73138243) 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, 401768 + ... + 401949.

It is an arithmetic number, because the mean of its divisors is an integer number (11252052).

Almost surely, 2^73138247 is an apocalyptic number.

73138247 is a deficient number, since it is larger than the sum of its proper divisors (16878169).

73138247 is a wasteful number, since it uses less digits than its factorization.

73138247 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 803737.

The product of its digits is 28224, while the sum is 35.

The square root of 73138247 is about 8552.0902123399. The cubic root of 73138247 is about 418.1975802574.

The spelling of 73138247 in words is "seventy-three million, one hundred thirty-eight thousand, two hundred forty-seven".