245619943 has 2 divisors, whose sum is σ = 245619944. Its totient is φ = 245619942.

The previous prime is 245619931. The next prime is 245619953. The reversal of 245619943 is 349916542.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-245619943 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 245619943.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (245619953) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 122809971 + 122809972.

It is an arithmetic number, because the mean of its divisors is an integer number (122809972).

Almost surely, 2^245619943 is an apocalyptic number.

245619943 is a deficient number, since it is larger than the sum of its proper divisors (1).

245619943 is an equidigital number, since it uses as much as digits as its factorization.

245619943 is an evil number, because the sum of its binary digits is even.

The product of its digits is 233280, while the sum is 43.

The square root of 245619943 is about 15672.2666835401. The cubic root of 245619943 is about 626.2598102588.

The spelling of 245619943 in words is "two hundred forty-five million, six hundred nineteen thousand, nine hundred forty-three".