981225373 has 4 divisors (see below), whose sum is σ = 988387740. Its totient is φ = 974063008.

The previous prime is 981225347. The next prime is 981225389. The reversal of 981225373 is 373522189.

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

It can be written as a sum of positive squares in 2 ways, for example, as 336979449 + 644245924 = 18357^2 + 25382^2 .

It is a cyclic number.

It is not a de Polignac number, because 981225373 - 2⁹ = 981224861 is a prime.

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (981225173) 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, 3580978 + ... + 3581251.

It is an arithmetic number, because the mean of its divisors is an integer number (247096935).

Almost surely, 2^981225373 is an apocalyptic number.

It is an amenable number.

981225373 is a deficient number, since it is larger than the sum of its proper divisors (7162367).

981225373 is a wasteful number, since it uses less digits than its factorization.

981225373 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7162366.

The product of its digits is 90720, while the sum is 40.

The square root of 981225373 is about 31324.5171231737. The cubic root of 981225373 is about 993.7022121292.

The spelling of 981225373 in words is "nine hundred eighty-one million, two hundred twenty-five thousand, three hundred seventy-three".