420545496989 has 2 divisors, whose sum is σ = 420545496990. Its totient is φ = 420545496988.

The previous prime is 420545496947. The next prime is 420545497007. The reversal of 420545496989 is 989694545024.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 352467816100 + 68077680889 = 593690^2 + 260917^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-420545496989 is a prime.

It is a super-2 number, since 2×420545496989² (a number of 24 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (420545496289) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 210272748494 + 210272748495.

It is an arithmetic number, because the mean of its divisors is an integer number (210272748495).

Almost surely, 2^420545496989 is an apocalyptic number.

It is an amenable number.

420545496989 is a deficient number, since it is larger than the sum of its proper divisors (1).

420545496989 is an equidigital number, since it uses as much as digits as its factorization.

420545496989 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 111974400, while the sum is 65.

The spelling of 420545496989 in words is "four hundred twenty billion, five hundred forty-five million, four hundred ninety-six thousand, nine hundred eighty-nine".