981481506 has 8 divisors (see below), whose sum is σ = 1962963024. Its totient is φ = 327160500.

The previous prime is 981481477. The next prime is 981481559. The reversal of 981481506 is 605184189.

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

981481506 is an admirable number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 81790120 + ... + 81790131.

It is an arithmetic number, because the mean of its divisors is an integer number (245370378).

Almost surely, 2^981481506 is an apocalyptic number.

981481506 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

981481506 is a wasteful number, since it uses less digits than its factorization.

981481506 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 163580256.

The product of its (nonzero) digits is 69120, while the sum is 42.

The square root of 981481506 is about 31328.6052354713. The cubic root of 981481506 is about 993.7886678993.

The spelling of 981481506 in words is "nine hundred eighty-one million, four hundred eighty-one thousand, five hundred six".