1381192427 has 2 divisors, whose sum is σ = 1381192428. Its totient is φ = 1381192426.

The previous prime is 1381192391. The next prime is 1381192433. The reversal of 1381192427 is 7242911831.

It is a happy number.

It is a strong prime.

It is an emirp because it is prime and its reverse (7242911831) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1381192427 - 2¹⁰ = 1381191403 is a prime.

It is not a weakly prime, because it can be changed into another prime (1381192447) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 690596213 + 690596214.

It is an arithmetic number, because the mean of its divisors is an integer number (690596214).

Almost surely, 2^1381192427 is an apocalyptic number.

1381192427 is a deficient number, since it is larger than the sum of its proper divisors (1).

1381192427 is an equidigital number, since it uses as much as digits as its factorization.

1381192427 is an evil number, because the sum of its binary digits is even.

The product of its digits is 24192, while the sum is 38.

The square root of 1381192427 is about 37164.3973044095. The cubic root of 1381192427 is about 1113.6568588278.

The spelling of 1381192427 in words is "one billion, three hundred eighty-one million, one hundred ninety-two thousand, four hundred twenty-seven".