73290731 has 2 divisors, whose sum is σ = 73290732. Its totient is φ = 73290730.

The previous prime is 73290713. The next prime is 73290769. The reversal of 73290731 is 13709237.

Together with previous prime (73290713) it forms an Ormiston pair, because they use the same digits, order apart.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 73290731 - 2⁶ = 73290667 is a prime.

It is a super-2 number, since 2×73290731² = 10743062501028722, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (73290781) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 36645365 + 36645366.

It is an arithmetic number, because the mean of its divisors is an integer number (36645366).

Almost surely, 2^73290731 is an apocalyptic number.

73290731 is a deficient number, since it is larger than the sum of its proper divisors (1).

73290731 is an equidigital number, since it uses as much as digits as its factorization.

73290731 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 7938, while the sum is 32.

The square root of 73290731 is about 8561.0005840439. Note that the first 3 decimals coincide. The cubic root of 73290731 is about 418.4880082132.

Adding to 73290731 its reverse (13709237), we get a palindrome (86999968).

The spelling of 73290731 in words is "seventy-three million, two hundred ninety thousand, seven hundred thirty-one".