1308001989987 has 72 divisors (see below), whose sum is σ = 2433384862272. Its totient is φ = 669339871200.

The previous prime is 1308001989979. The next prime is 1308001989989. The reversal of 1308001989987 is 7899891008031.

It is not a de Polignac number, because 1308001989987 - 2³ = 1308001989979 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (63).

It is not an unprimeable number, because it can be changed into a prime (1308001989989) by changing a digit.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 1687189 + ... + 2337222.

It is an arithmetic number, because the mean of its divisors is an integer number (33797011976).

Almost surely, 2^{1308001989987} is an apocalyptic number.

1308001989987 is a deficient number, since it is larger than the sum of its proper divisors (1125382872285).

1308001989987 is a wasteful number, since it uses less digits than its factorization.

1308001989987 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4024509 (or 4024499 counting only the distinct ones).

The product of its (nonzero) digits is 7838208, while the sum is 63.

The spelling of 1308001989987 in words is "one trillion, three hundred eight billion, one million, nine hundred eighty-nine thousand, nine hundred eighty-seven".