1002379987 has 8 divisors (see below), whose sum is σ = 1176538976. Its totient is φ = 835961472.

The previous prime is 1002379981. The next prime is 1002380003. The reversal of 1002379987 is 7899732001.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 1002379987 - 2¹¹ = 1002377939 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1002379981) 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, 1934838 + ... + 1935355.

It is an arithmetic number, because the mean of its divisors is an integer number (147067372).

Almost surely, 2^1002379987 is an apocalyptic number.

1002379987 is a deficient number, since it is larger than the sum of its proper divisors (174158989).

1002379987 is an equidigital number, since it uses as much as digits as its factorization.

1002379987 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3870237.

The product of its (nonzero) digits is 190512, while the sum is 46.

The square root of 1002379987 is about 31660.3851366341. The cubic root of 1002379987 is about 1000.7927004599.

It can be divided in two parts, 100237 and 9987, that added together give a square (110224 = 332²).

The spelling of 1002379987 in words is "one billion, two million, three hundred seventy-nine thousand, nine hundred eighty-seven".