977788147 has 4 divisors (see below), whose sum is σ = 1117472176. Its totient is φ = 838104120.

The previous prime is 977788129. The next prime is 977788181. The reversal of 977788147 is 741887779.

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

It is not a de Polignac number, because 977788147 - 2¹¹ = 977786099 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 977788091 and 977788100.

It is not an unprimeable number, because it can be changed into a prime (977789147) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 69842004 + ... + 69842017.

It is an arithmetic number, because the mean of its divisors is an integer number (279368044).

Almost surely, 2^977788147 is an apocalyptic number.

977788147 is a deficient number, since it is larger than the sum of its proper divisors (139684029).

977788147 is a wasteful number, since it uses less digits than its factorization.

977788147 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 139684028.

The product of its digits is 5531904, while the sum is 58.

The square root of 977788147 is about 31269.6042028037. The cubic root of 977788147 is about 992.5405438710.

The spelling of 977788147 in words is "nine hundred seventy-seven million, seven hundred eighty-eight thousand, one hundred forty-seven".