1023561887 has 2 divisors, whose sum is σ = 1023561888. Its totient is φ = 1023561886.

The previous prime is 1023561859. The next prime is 1023561919. The reversal of 1023561887 is 7881653201.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1023561887 - 2¹² = 1023557791 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1023561827) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 511780943 + 511780944.

It is an arithmetic number, because the mean of its divisors is an integer number (511780944).

Almost surely, 2^1023561887 is an apocalyptic number.

1023561887 is a deficient number, since it is larger than the sum of its proper divisors (1).

1023561887 is an equidigital number, since it uses as much as digits as its factorization.

1023561887 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 80640, while the sum is 41.

The square root of 1023561887 is about 31993.1537520139. The cubic root of 1023561887 is about 1007.7930725900.

The spelling of 1023561887 in words is "one billion, twenty-three million, five hundred sixty-one thousand, eight hundred eighty-seven".