981135407 has 8 divisors (see below), whose sum is σ = 1139680032. Its totient is φ = 827186400.

The previous prime is 981135359. The next prime is 981135409. The reversal of 981135407 is 704531189.

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

It is a cyclic number.

It is not a de Polignac number, because 981135407 - 2¹⁰ = 981134383 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 (981135409) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1148444 + ... + 1149297.

It is an arithmetic number, because the mean of its divisors is an integer number (142460004).

Almost surely, 2^981135407 is an apocalyptic number.

981135407 is a deficient number, since it is larger than the sum of its proper divisors (158544625).

981135407 is a wasteful number, since it uses less digits than its factorization.

981135407 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2297809.

The product of its (nonzero) digits is 30240, while the sum is 38.

The square root of 981135407 is about 31323.0810585421. The cubic root of 981135407 is about 993.6718412113.

The spelling of 981135407 in words is "nine hundred eighty-one million, one hundred thirty-five thousand, four hundred seven".