1427861431 has 2 divisors, whose sum is σ = 1427861432. Its totient is φ = 1427861430.

The previous prime is 1427861389. The next prime is 1427861447. The reversal of 1427861431 is 1341687241.

1427861431 = 15424² + 15425² + ... + 15429².

It is a strong prime.

It is an emirp because it is prime and its reverse (1341687241) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1427861431 - 2¹¹ = 1427859383 is a prime.

It is a super-3 number, since 3×1427861431³ (a number of 28 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1427861471) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 713930715 + 713930716.

It is an arithmetic number, because the mean of its divisors is an integer number (713930716).

Almost surely, 2^1427861431 is an apocalyptic number.

1427861431 is a deficient number, since it is larger than the sum of its proper divisors (1).

1427861431 is an equidigital number, since it uses as much as digits as its factorization.

1427861431 is an evil number, because the sum of its binary digits is even.

The product of its digits is 32256, while the sum is 37.

The square root of 1427861431 is about 37787.0537486055. The cubic root of 1427861431 is about 1126.0612684309.

The spelling of 1427861431 in words is "one billion, four hundred twenty-seven million, eight hundred sixty-one thousand, four hundred thirty-one".