427487619749 has 2 divisors, whose sum is σ = 427487619750. Its totient is φ = 427487619748.

The previous prime is 427487619719. The next prime is 427487619781. The reversal of 427487619749 is 947916784724.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 271865259649 + 155622360100 = 521407^2 + 394490^2 .

It is a cyclic number.

It is not a de Polignac number, because 427487619749 - 2²⁰ = 427486571173 is a prime.

It is a super-2 number, since 2×427487619749² (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 (427487619709) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 213743809874 + 213743809875.

It is an arithmetic number, because the mean of its divisors is an integer number (213743809875).

Almost surely, 2^427487619749 is an apocalyptic number.

It is an amenable number.

427487619749 is a deficient number, since it is larger than the sum of its proper divisors (1).

427487619749 is an equidigital number, since it uses as much as digits as its factorization.

427487619749 is an evil number, because the sum of its binary digits is even.

The product of its digits is 170698752, while the sum is 68.

The spelling of 427487619749 in words is "four hundred twenty-seven billion, four hundred eighty-seven million, six hundred nineteen thousand, seven hundred forty-nine".