427937089561 has 2 divisors, whose sum is σ = 427937089562. Its totient is φ = 427937089560.

The previous prime is 427937089493. The next prime is 427937089571. The reversal of 427937089561 is 165980739724.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 421258113936 + 6678975625 = 649044^2 + 81725^2 .

It is a cyclic number.

It is not a de Polignac number, because 427937089561 - 2²¹ = 427934992409 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 427937089561.

It is not a weakly prime, because it can be changed into another prime (427937089571) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 213968544780 + 213968544781.

It is an arithmetic number, because the mean of its divisors is an integer number (213968544781).

It is a 1-persistent number, because it is pandigital, but 2⋅427937089561 = 855874179122 is not.

Almost surely, 2^427937089561 is an apocalyptic number.

It is an amenable number.

427937089561 is a deficient number, since it is larger than the sum of its proper divisors (1).

427937089561 is an equidigital number, since it uses as much as digits as its factorization.

427937089561 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 22861440, while the sum is 61.

The spelling of 427937089561 in words is "four hundred twenty-seven billion, nine hundred thirty-seven million, eighty-nine thousand, five hundred sixty-one".