1320040087 has 2 divisors, whose sum is σ = 1320040088. Its totient is φ = 1320040086.

The previous prime is 1320040063. The next prime is 1320040133. The reversal of 1320040087 is 7800400231.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1320040087 - 2²⁷ = 1185822359 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1320040987) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 660020043 + 660020044.

It is an arithmetic number, because the mean of its divisors is an integer number (660020044).

Almost surely, 2^1320040087 is an apocalyptic number.

1320040087 is a deficient number, since it is larger than the sum of its proper divisors (1).

1320040087 is an equidigital number, since it uses as much as digits as its factorization.

1320040087 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1344, while the sum is 25.

The square root of 1320040087 is about 36332.3559241621. The cubic root of 1320040087 is about 1096.9724148913.

The spelling of 1320040087 in words is "one billion, three hundred twenty million, forty thousand, eighty-seven".