9877407989 has 2 divisors, whose sum is σ = 9877407990. Its totient is φ = 9877407988.

The previous prime is 9877407979. The next prime is 9877408003. The reversal of 9877407989 is 9897047789.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 7208859025 + 2668548964 = 84905^2 + 51658^2 .

It is an emirp because it is prime and its reverse (9897047789) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 9877407989 - 2²⁸ = 9608972533 is a prime.

It is a super-2 number, since 2×9877407989² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (9877407919) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4938703994 + 4938703995.

It is an arithmetic number, because the mean of its divisors is an integer number (4938703995).

Almost surely, 2^9877407989 is an apocalyptic number.

It is an amenable number.

9877407989 is a deficient number, since it is larger than the sum of its proper divisors (1).

9877407989 is an equidigital number, since it uses as much as digits as its factorization.

9877407989 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 64012032, while the sum is 68.

The square root of 9877407989 is about 99385.1497407938. The cubic root of 9877407989 is about 2145.5945840925.

The spelling of 9877407989 in words is "nine billion, eight hundred seventy-seven million, four hundred seven thousand, nine hundred eighty-nine".