973323391 has 2 divisors, whose sum is σ = 973323392. Its totient is φ = 973323390.

The previous prime is 973323383. The next prime is 973323427. The reversal of 973323391 is 193323379.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 973323391 - 2³ = 973323383 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (973323311) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 486661695 + 486661696.

It is an arithmetic number, because the mean of its divisors is an integer number (486661696).

Almost surely, 2^973323391 is an apocalyptic number.

973323391 is a deficient number, since it is larger than the sum of its proper divisors (1).

973323391 is an equidigital number, since it uses as much as digits as its factorization.

973323391 is an evil number, because the sum of its binary digits is even.

The product of its digits is 91854, while the sum is 40.

The square root of 973323391 is about 31198.1312100581. The cubic root of 973323391 is about 991.0275326055.

It can be divided in two parts, 9733 and 23391, that added together give a square (33124 = 182²).

The spelling of 973323391 in words is "nine hundred seventy-three million, three hundred twenty-three thousand, three hundred ninety-one".