1002402987 has 4 divisors (see below), whose sum is σ = 1336537320. Its totient is φ = 668268656.

The previous prime is 1002402983. The next prime is 1002403021. The reversal of 1002402987 is 7892042001.

It is a happy number.

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 1002402987 - 2² = 1002402983 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1002402983) 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, 167067162 + ... + 167067167.

It is an arithmetic number, because the mean of its divisors is an integer number (334134330).

Almost surely, 2^1002402987 is an apocalyptic number.

1002402987 is a deficient number, since it is larger than the sum of its proper divisors (334134333).

1002402987 is an equidigital number, since it uses as much as digits as its factorization.

1002402987 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 334134332.

The product of its (nonzero) digits is 8064, while the sum is 33.

The square root of 1002402987 is about 31660.7483644970. The cubic root of 1002402987 is about 1000.8003549278.

Adding to 1002402987 its reverse (7892042001), we get a palindrome (8894444988).

The spelling of 1002402987 in words is "one billion, two million, four hundred two thousand, nine hundred eighty-seven".