1381192447 has 2 divisors, whose sum is σ = 1381192448. Its totient is φ = 1381192446.

The previous prime is 1381192433. The next prime is 1381192451. The reversal of 1381192447 is 7442911831.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1381192447 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1381192427) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 690596223 + 690596224.

It is an arithmetic number, because the mean of its divisors is an integer number (690596224).

Almost surely, 2^1381192447 is an apocalyptic number.

1381192447 is a deficient number, since it is larger than the sum of its proper divisors (1).

1381192447 is an equidigital number, since it uses as much as digits as its factorization.

1381192447 is an evil number, because the sum of its binary digits is even.

The product of its digits is 48384, while the sum is 40.

The square root of 1381192447 is about 37164.3975734842. The cubic root of 1381192447 is about 1113.6568642032.

The spelling of 1381192447 in words is "one billion, three hundred eighty-one million, one hundred ninety-two thousand, four hundred forty-seven".