1287188023 has 8 divisors (see below), whose sum is σ = 1427225616. Its totient is φ = 1150987200.

The previous prime is 1287188009. The next prime is 1287188029. The reversal of 1287188023 is 3208817821.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 1287188023 - 2⁵ = 1287187991 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 (1287188029) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 958486 + ... + 959827.

It is an arithmetic number, because the mean of its divisors is an integer number (178403202).

Almost surely, 2^1287188023 is an apocalyptic number.

1287188023 is a deficient number, since it is larger than the sum of its proper divisors (140037593).

1287188023 is a wasteful number, since it uses less digits than its factorization.

1287188023 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1918385.

The product of its (nonzero) digits is 43008, while the sum is 40.

The square root of 1287188023 is about 35877.4026791238. The cubic root of 1287188023 is about 1087.7956806957.

The spelling of 1287188023 in words is "one billion, two hundred eighty-seven million, one hundred eighty-eight thousand, twenty-three".