979780487 has 4 divisors (see below), whose sum is σ = 1119749136. Its totient is φ = 839811840.

The previous prime is 979780469. The next prime is 979780493. The reversal of 979780487 is 784087979.

979780487 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is not a de Polignac number, because 979780487 - 2⁶ = 979780423 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 (979780447) 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, 69984314 + ... + 69984327.

It is an arithmetic number, because the mean of its divisors is an integer number (279937284).

Almost surely, 2^979780487 is an apocalyptic number.

979780487 is a deficient number, since it is larger than the sum of its proper divisors (139968649).

979780487 is a wasteful number, since it uses less digits than its factorization.

979780487 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 139968648.

The product of its (nonzero) digits is 7112448, while the sum is 59.

The square root of 979780487 is about 31301.4454458576. The cubic root of 979780487 is about 993.2142196732.

The spelling of 979780487 in words is "nine hundred seventy-nine million, seven hundred eighty thousand, four hundred eighty-seven".