978659461 has 4 divisors (see below), whose sum is σ = 1053940972. Its totient is φ = 903377952.

The previous prime is 978659459. The next prime is 978659471. The reversal of 978659461 is 164956879.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 164956879 = 19 ⋅8681941.

It can be written as a sum of positive squares in 2 ways, for example, as 283282561 + 695376900 = 16831^2 + 26370^2 .

It is a cyclic number.

It is not a de Polignac number, because 978659461 - 2¹ = 978659459 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 (978659411) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 37640736 + ... + 37640761.

It is an arithmetic number, because the mean of its divisors is an integer number (263485243).

Almost surely, 2^978659461 is an apocalyptic number.

It is an amenable number.

978659461 is a deficient number, since it is larger than the sum of its proper divisors (75281511).

978659461 is a wasteful number, since it uses less digits than its factorization.

978659461 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 75281510.

The product of its digits is 3265920, while the sum is 55.

The square root of 978659461 is about 31283.5333841943. The cubic root of 978659461 is about 992.8352763310.

The spelling of 978659461 in words is "nine hundred seventy-eight million, six hundred fifty-nine thousand, four hundred sixty-one".