1287903023 has 4 divisors (see below), whose sum is σ = 1404985128. Its totient is φ = 1170820920.

The previous prime is 1287902989. The next prime is 1287903053. The reversal of 1287903023 is 3203097821.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 1287903023 - 2⁸ = 1287902767 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1287903053) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 58541036 + ... + 58541057.

It is an arithmetic number, because the mean of its divisors is an integer number (351246282).

Almost surely, 2^1287903023 is an apocalyptic number.

1287903023 is a deficient number, since it is larger than the sum of its proper divisors (117082105).

1287903023 is a wasteful number, since it uses less digits than its factorization.

1287903023 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 117082104.

The product of its (nonzero) digits is 18144, while the sum is 35.

The square root of 1287903023 is about 35887.3657851896. The cubic root of 1287903023 is about 1087.9970576329.

The spelling of 1287903023 in words is "one billion, two hundred eighty-seven million, nine hundred three thousand, twenty-three".