981392653 has 4 divisors (see below), whose sum is σ = 985124448. Its totient is φ = 977660860.

The previous prime is 981392641. The next prime is 981392663. The reversal of 981392653 is 356293189.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-981392653 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 (981392623) 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, 1865503 + ... + 1866028.

It is an arithmetic number, because the mean of its divisors is an integer number (246281112).

Almost surely, 2^981392653 is an apocalyptic number.

It is an amenable number.

981392653 is a deficient number, since it is larger than the sum of its proper divisors (3731795).

981392653 is a wasteful number, since it uses less digits than its factorization.

981392653 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3731794.

The product of its digits is 349920, while the sum is 46.

The square root of 981392653 is about 31327.1871223702. The cubic root of 981392653 is about 993.7586779406.

The spelling of 981392653 in words is "nine hundred eighty-one million, three hundred ninety-two thousand, six hundred fifty-three".