242620789 has 2 divisors, whose sum is σ = 242620790. Its totient is φ = 242620788.

The previous prime is 242620769. The next prime is 242620841. The reversal of 242620789 is 987026242.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 223741764 + 18879025 = 14958^2 + 4345^2 .

It is a cyclic number.

It is not a de Polignac number, because 242620789 - 2¹³ = 242612597 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (242620769) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 121310394 + 121310395.

It is an arithmetic number, because the mean of its divisors is an integer number (121310395).

Almost surely, 2^242620789 is an apocalyptic number.

It is an amenable number.

242620789 is a deficient number, since it is larger than the sum of its proper divisors (1).

242620789 is an equidigital number, since it uses as much as digits as its factorization.

242620789 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 96768, while the sum is 40.

The square root of 242620789 is about 15576.2893206309. The cubic root of 242620789 is about 623.7003727034.

The spelling of 242620789 in words is "two hundred forty-two million, six hundred twenty thousand, seven hundred eighty-nine".