73073731 has 4 divisors (see below), whose sum is σ = 73420264. Its totient is φ = 72727200.

The previous prime is 73073729. The next prime is 73073747. The reversal of 73073731 is 13737037.

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

It is a cyclic number.

It is not a de Polignac number, because 73073731 - 2¹ = 73073729 is a prime.

It is a super-2 number, since 2×73073731² = 10679540324520722, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 73073693 and 73073702.

It is not an unprimeable number, because it can be changed into a prime (73073711) 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, 172950 + ... + 173371.

It is an arithmetic number, because the mean of its divisors is an integer number (18355066).

Almost surely, 2^73073731 is an apocalyptic number.

73073731 is a deficient number, since it is larger than the sum of its proper divisors (346533).

73073731 is a wasteful number, since it uses less digits than its factorization.

73073731 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 346532.

The product of its (nonzero) digits is 9261, while the sum is 31.

The square root of 73073731 is about 8548.3174367825. The cubic root of 73073731 is about 418.0745786209.

The spelling of 73073731 in words is "seventy-three million, seventy-three thousand, seven hundred thirty-one".