1427053781 has 2 divisors, whose sum is σ = 1427053782. Its totient is φ = 1427053780.

The previous prime is 1427053759. The next prime is 1427053829. The reversal of 1427053781 is 1873507241.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1101576100 + 325477681 = 33190^2 + 18041^2 .

It is a cyclic number.

It is not a de Polignac number, because 1427053781 - 2²⁶ = 1359944917 is a prime.

It is a super-2 number, since 2×1427053781² = 4072964987732791922, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1427053741) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 713526890 + 713526891.

It is an arithmetic number, because the mean of its divisors is an integer number (713526891).

Almost surely, 2^1427053781 is an apocalyptic number.

It is an amenable number.

1427053781 is a deficient number, since it is larger than the sum of its proper divisors (1).

1427053781 is an equidigital number, since it uses as much as digits as its factorization.

1427053781 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 47040, while the sum is 38.

The square root of 1427053781 is about 37776.3653757214. The cubic root of 1427053781 is about 1125.8489147453.

The spelling of 1427053781 in words is "one billion, four hundred twenty-seven million, fifty-three thousand, seven hundred eighty-one".