981947465 has 8 divisors (see below), whose sum is σ = 1178505288. Its totient is φ = 785445760.

The previous prime is 981947459. The next prime is 981947501. The reversal of 981947465 is 564749189.

It can be written as a sum of positive squares in 4 ways, for example, as 50965321 + 930982144 = 7139^2 + 30512^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 981947465 - 2¹⁸ = 981685321 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 59789 + ... + 74421.

It is an arithmetic number, because the mean of its divisors is an integer number (147313161).

Almost surely, 2^981947465 is an apocalyptic number.

It is an amenable number.

981947465 is a deficient number, since it is larger than the sum of its proper divisors (196557823).

981947465 is a wasteful number, since it uses less digits than its factorization.

981947465 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28059.

The product of its digits is 2177280, while the sum is 53.

The square root of 981947465 is about 31336.0409911654. The cubic root of 981947465 is about 993.9459102960.

The spelling of 981947465 in words is "nine hundred eighty-one million, nine hundred forty-seven thousand, four hundred sixty-five".