981006431 has 4 divisors (see below), whose sum is σ = 990006600. Its totient is φ = 972006264.

The previous prime is 981006413. The next prime is 981006443. The reversal of 981006431 is 134600189.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 981006431 - 2¹⁸ = 980744287 is a prime.

It is a super-2 number, since 2×981006431² = 1924747235326715522, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (981006451) 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, 4499921 + ... + 4500138.

It is an arithmetic number, because the mean of its divisors is an integer number (247501650).

Almost surely, 2^981006431 is an apocalyptic number.

981006431 is a deficient number, since it is larger than the sum of its proper divisors (9000169).

981006431 is a wasteful number, since it uses less digits than its factorization.

981006431 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9000168.

The product of its (nonzero) digits is 5184, while the sum is 32.

The square root of 981006431 is about 31321.0221895774. The cubic root of 981006431 is about 993.6282979740.

The spelling of 981006431 in words is "nine hundred eighty-one million, six thousand, four hundred thirty-one".