9400789977 has 16 divisors (see below), whose sum is σ = 13141367808. Its totient is φ = 5966286480.

The previous prime is 9400789973. The next prime is 9400789991. The reversal of 9400789977 is 7799870049.

It is not a de Polignac number, because 9400789977 - 2² = 9400789973 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 9400789977.

It is not an unprimeable number, because it can be changed into a prime (9400789973) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 308293 + ... + 337410.

It is an arithmetic number, because the mean of its divisors is an integer number (821335488).

Almost surely, 2^9400789977 is an apocalyptic number.

It is an amenable number.

9400789977 is a deficient number, since it is larger than the sum of its proper divisors (3740577831).

9400789977 is a wasteful number, since it uses less digits than its factorization.

9400789977 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 645940.

The product of its (nonzero) digits is 8001504, while the sum is 60.

The square root of 9400789977 is about 96957.6710580447. The cubic root of 9400789977 is about 2110.5134137685.

The spelling of 9400789977 in words is "nine billion, four hundred million, seven hundred eighty-nine thousand, nine hundred seventy-seven".