240691973 has 2 divisors, whose sum is σ = 240691974. Its totient is φ = 240691972.

The previous prime is 240691963. The next prime is 240691999. The reversal of 240691973 is 379196042.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 203262049 + 37429924 = 14257^2 + 6118^2 .

It is a cyclic number.

It is not a de Polignac number, because 240691973 - 2¹⁰ = 240690949 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 240691973.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (240691963) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 120345986 + 120345987.

It is an arithmetic number, because the mean of its divisors is an integer number (120345987).

Almost surely, 2^240691973 is an apocalyptic number.

It is an amenable number.

240691973 is a deficient number, since it is larger than the sum of its proper divisors (1).

240691973 is an equidigital number, since it uses as much as digits as its factorization.

240691973 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 81648, while the sum is 41.

The square root of 240691973 is about 15514.2506425544. The cubic root of 240691973 is about 622.0431839346.

The spelling of 240691973 in words is "two hundred forty million, six hundred ninety-one thousand, nine hundred seventy-three".