987920907 has 4 divisors (see below), whose sum is σ = 1317227880. Its totient is φ = 658613936.

The previous prime is 987920897. The next prime is 987920917. The reversal of 987920907 is 709029789.

It is a happy number.

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

It is an interprime number because it is at equal distance from previous prime (987920897) and next prime (987920917).

It is a cyclic number.

It is not a de Polignac number, because 987920907 - 2⁸ = 987920651 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 987920907.

It is not an unprimeable number, because it can be changed into a prime (987920917) 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, 164653482 + ... + 164653487.

It is an arithmetic number, because the mean of its divisors is an integer number (329306970).

Almost surely, 2^987920907 is an apocalyptic number.

987920907 is a deficient number, since it is larger than the sum of its proper divisors (329306973).

987920907 is a wasteful number, since it uses less digits than its factorization.

987920907 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 329306972.

The product of its (nonzero) digits is 571536, while the sum is 51.

The square root of 987920907 is about 31431.2091240538. The cubic root of 987920907 is about 995.9573143833.

The spelling of 987920907 in words is "nine hundred eighty-seven million, nine hundred twenty thousand, nine hundred seven".