9877961967 has 4 divisors (see below), whose sum is σ = 13170615960. Its totient is φ = 6585307976.

The previous prime is 9877961959. The next prime is 9877961971. The reversal of 9877961967 is 7691697789.

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 9877961967 - 2³ = 9877961959 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9877961987) 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, 1646326992 + ... + 1646326997.

It is an arithmetic number, because the mean of its divisors is an integer number (3292653990).

Almost surely, 2^9877961967 is an apocalyptic number.

9877961967 is a deficient number, since it is larger than the sum of its proper divisors (3292653993).

9877961967 is a wasteful number, since it uses less digits than its factorization.

9877961967 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3292653992.

The product of its digits is 72013536, while the sum is 69.

The square root of 9877961967 is about 99387.9367277538. The cubic root of 9877961967 is about 2145.6346954921.

The spelling of 9877961967 in words is "nine billion, eight hundred seventy-seven million, nine hundred sixty-one thousand, nine hundred sixty-seven".