475108981 has 4 divisors (see below), whose sum is σ = 475474912. Its totient is φ = 474743052.

The previous prime is 475108919. The next prime is 475108987. The reversal of 475108981 is 189801574.

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 not a de Polignac number, because 475108981 - 2¹⁵ = 475076213 is a prime.

It is a super-2 number, since 2×475108981² = 451457087653716722, 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 (475108987) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 181011 + ... + 183616.

It is an arithmetic number, because the mean of its divisors is an integer number (118868728).

Almost surely, 2^475108981 is an apocalyptic number.

It is an amenable number.

475108981 is a deficient number, since it is larger than the sum of its proper divisors (365931).

475108981 is a wasteful number, since it uses less digits than its factorization.

475108981 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 365930.

The product of its (nonzero) digits is 80640, while the sum is 43.

The square root of 475108981 is about 21796.9947699218. The cubic root of 475108981 is about 780.3050423147.

The spelling of 475108981 in words is "four hundred seventy-five million, one hundred eight thousand, nine hundred eighty-one".