801540787 has 2 divisors, whose sum is σ = 801540788. Its totient is φ = 801540786.

The previous prime is 801540749. The next prime is 801540791. The reversal of 801540787 is 787045108.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-801540787 is a prime.

It is not a weakly prime, because it can be changed into another prime (801541787) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 400770393 + 400770394.

It is an arithmetic number, because the mean of its divisors is an integer number (400770394).

Almost surely, 2^801540787 is an apocalyptic number.

801540787 is a deficient number, since it is larger than the sum of its proper divisors (1).

801540787 is an equidigital number, since it uses as much as digits as its factorization.

801540787 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 62720, while the sum is 40.

The square root of 801540787 is about 28311.4956687209. The cubic root of 801540787 is about 928.9133594966.

The spelling of 801540787 in words is "eight hundred one million, five hundred forty thousand, seven hundred eighty-seven".