855507487 has 2 divisors, whose sum is σ = 855507488. Its totient is φ = 855507486.

The previous prime is 855507469. The next prime is 855507551. The reversal of 855507487 is 784705558.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 855507487 - 2²³ = 847118879 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 855507487.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (855507407) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 427753743 + 427753744.

It is an arithmetic number, because the mean of its divisors is an integer number (427753744).

Almost surely, 2^855507487 is an apocalyptic number.

855507487 is a deficient number, since it is larger than the sum of its proper divisors (1).

855507487 is an equidigital number, since it uses as much as digits as its factorization.

855507487 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1568000, while the sum is 49.

The square root of 855507487 is about 29249.0595917202. The cubic root of 855507487 is about 949.3097430963.

The spelling of 855507487 in words is "eight hundred fifty-five million, five hundred seven thousand, four hundred eighty-seven".