1381294087 has 2 divisors, whose sum is σ = 1381294088. Its totient is φ = 1381294086.

The previous prime is 1381294073. The next prime is 1381294097. The reversal of 1381294087 is 7804921831.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1381294087 - 2⁷ = 1381293959 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1381294067) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 690647043 + 690647044.

It is an arithmetic number, because the mean of its divisors is an integer number (690647044).

Almost surely, 2^1381294087 is an apocalyptic number.

1381294087 is a deficient number, since it is larger than the sum of its proper divisors (1).

1381294087 is an equidigital number, since it uses as much as digits as its factorization.

1381294087 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 96768, while the sum is 43.

The square root of 1381294087 is about 37165.7649860729. The cubic root of 1381294087 is about 1113.6841810113.

The spelling of 1381294087 in words is "one billion, three hundred eighty-one million, two hundred ninety-four thousand, eighty-seven".