287640767 has 2 divisors, whose sum is σ = 287640768. Its totient is φ = 287640766.

The previous prime is 287640739. The next prime is 287640781. The reversal of 287640767 is 767046782.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 287640767 - 2¹⁶ = 287575231 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (287640797) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 143820383 + 143820384.

It is an arithmetic number, because the mean of its divisors is an integer number (143820384).

Almost surely, 2^287640767 is an apocalyptic number.

287640767 is a deficient number, since it is larger than the sum of its proper divisors (1).

287640767 is an equidigital number, since it uses as much as digits as its factorization.

287640767 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 790272, while the sum is 47.

The square root of 287640767 is about 16959.9754421992. The cubic root of 287640767 is about 660.1107611784.

The spelling of 287640767 in words is "two hundred eighty-seven million, six hundred forty thousand, seven hundred sixty-seven".