406023081 has 4 divisors (see below), whose sum is σ = 541364112. Its totient is φ = 270682052.

The previous prime is 406023077. The next prime is 406023091. The reversal of 406023081 is 180320604.

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 406023081 - 2² = 406023077 is a prime.

It is a super-2 number, since 2×406023081² = 329709484609465122, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (406023011) 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, 67670511 + ... + 67670516.

It is an arithmetic number, because the mean of its divisors is an integer number (135341028).

Almost surely, 2^406023081 is an apocalyptic number.

It is an amenable number.

406023081 is a deficient number, since it is larger than the sum of its proper divisors (135341031).

406023081 is a wasteful number, since it uses less digits than its factorization.

406023081 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 135341030.

The product of its (nonzero) digits is 1152, while the sum is 24.

The square root of 406023081 is about 20150.0144168683. The cubic root of 406023081 is about 740.4860946711.

Adding to 406023081 its reverse (180320604), we get a palindrome (586343685).

The spelling of 406023081 in words is "four hundred six million, twenty-three thousand, eighty-one".