242987623 has 2 divisors, whose sum is σ = 242987624. Its totient is φ = 242987622.

The previous prime is 242987611. The next prime is 242987639. The reversal of 242987623 is 326789242.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-242987623 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 242987623.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (242987653) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 121493811 + 121493812.

It is an arithmetic number, because the mean of its divisors is an integer number (121493812).

Almost surely, 2^242987623 is an apocalyptic number.

242987623 is a deficient number, since it is larger than the sum of its proper divisors (1).

242987623 is an equidigital number, since it uses as much as digits as its factorization.

242987623 is an evil number, because the sum of its binary digits is even.

The product of its digits is 290304, while the sum is 43.

The square root of 242987623 is about 15588.0602706046. The cubic root of 242987623 is about 624.0145520042.

The spelling of 242987623 in words is "two hundred forty-two million, nine hundred eighty-seven thousand, six hundred twenty-three".