9978077 has 4 divisors (see below), whose sum is σ = 9984480. Its totient is φ = 9971676.

The previous prime is 9978041. The next prime is 9978079. The reversal of 9978077 is 7708799.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 9978077 - 2¹⁰ = 9977053 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9978079) 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, 824 + ... + 4542.

It is an arithmetic number, because the mean of its divisors is an integer number (2496120).

Almost surely, 2^9978077 is an apocalyptic number.

It is an amenable number.

9978077 is a deficient number, since it is larger than the sum of its proper divisors (6403).

9978077 is a wasteful number, since it uses less digits than its factorization.

9978077 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6402.

The product of its (nonzero) digits is 222264, while the sum is 47.

The square root of 9978077 is about 3158.8094276167. The cubic root of 9978077 is about 215.2859149061.

The spelling of 9978077 in words is "nine million, nine hundred seventy-eight thousand, seventy-seven".