400506061 has 4 divisors (see below), whose sum is σ = 417919392. Its totient is φ = 383092732.

The previous prime is 400506059. The next prime is 400506079. The reversal of 400506061 is 160605004.

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 400506061 - 2¹ = 400506059 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 (400506361) 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, 8706631 + ... + 8706676.

It is an arithmetic number, because the mean of its divisors is an integer number (104479848).

Almost surely, 2^400506061 is an apocalyptic number.

It is an amenable number.

400506061 is a deficient number, since it is larger than the sum of its proper divisors (17413331).

400506061 is a wasteful number, since it uses less digits than its factorization.

400506061 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17413330.

The product of its (nonzero) digits is 720, while the sum is 22.

The square root of 400506061 is about 20012.6475260022. The cubic root of 400506061 is about 737.1168928930.

The spelling of 400506061 in words is "four hundred million, five hundred six thousand, sixty-one".