240638873 has 2 divisors, whose sum is σ = 240638874. Its totient is φ = 240638872.

The previous prime is 240638869. The next prime is 240638887. The reversal of 240638873 is 378836042.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 214710409 + 25928464 = 14653^2 + 5092^2 .

It is a cyclic number.

It is not a de Polignac number, because 240638873 - 2² = 240638869 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 240638873.

It is not a weakly prime, because it can be changed into another prime (240638813) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 120319436 + 120319437.

It is an arithmetic number, because the mean of its divisors is an integer number (120319437).

Almost surely, 2^240638873 is an apocalyptic number.

It is an amenable number.

240638873 is a deficient number, since it is larger than the sum of its proper divisors (1).

240638873 is an equidigital number, since it uses as much as digits as its factorization.

240638873 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 193536, while the sum is 41.

The square root of 240638873 is about 15512.5392183227. The cubic root of 240638873 is about 621.9974367750.

The spelling of 240638873 in words is "two hundred forty million, six hundred thirty-eight thousand, eight hundred seventy-three".