42890359397 has 2 divisors, whose sum is σ = 42890359398. Its totient is φ = 42890359396.

The previous prime is 42890359363. The next prime is 42890359427. The reversal of 42890359397 is 79395309824.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 32833077601 + 10057281796 = 181199^2 + 100286^2 .

It is a cyclic number.

It is not a de Polignac number, because 42890359397 - 2¹⁶ = 42890293861 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (42890359307) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21445179698 + 21445179699.

It is an arithmetic number, because the mean of its divisors is an integer number (21445179699).

Almost surely, 2^42890359397 is an apocalyptic number.

It is an amenable number.

42890359397 is a deficient number, since it is larger than the sum of its proper divisors (1).

42890359397 is an equidigital number, since it uses as much as digits as its factorization.

42890359397 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 14696640, while the sum is 59.

The spelling of 42890359397 in words is "forty-two billion, eight hundred ninety million, three hundred fifty-nine thousand, three hundred ninety-seven".