9977013225 has 27 divisors (see below), whose sum is σ = 17872623223. Its totient is φ = 5320274640.

The previous prime is 9977013203. The next prime is 9977013229. The reversal of 9977013225 is 5223107799.

The square root of 9977013225 is 99885.

It is a perfect power (a square), and thus also a powerful number.

9977013225 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in only one way, i.e., 3591724761 + 6385288464 = 59931^2 + 79908^2 .

It is not a de Polignac number, because 9977013225 - 2³¹ = 7829529577 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (9977013229) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 26 ways as a sum of consecutive naturals, for example, 1494946 + ... + 1501604.

Almost surely, 2^9977013225 is an apocalyptic number.

9977013225 is the 99885-th square number.

9977013225 is the 49943-rd centered octagonal number.

It is an amenable number.

9977013225 is a deficient number, since it is larger than the sum of its proper divisors (7895609998).

9977013225 is an frugal number, since it uses more digits than its factorization.

9977013225 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13334 (or 6667 counting only the distinct ones).

The product of its (nonzero) digits is 238140, while the sum is 45.

The cubic root of 9977013225 is about 2152.7826400254.

The spelling of 9977013225 in words is "nine billion, nine hundred seventy-seven million, thirteen thousand, two hundred twenty-five".