396606531 has 4 divisors (see below), whose sum is σ = 528808712. Its totient is φ = 264404352.

The previous prime is 396606487. The next prime is 396606533. The reversal of 396606531 is 135606693.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 135606693 = 3 ⋅45202231.

It is not a de Polignac number, because 396606531 - 2¹⁰ = 396605507 is a prime.

It is a super-2 number, since 2×396606531² = 314593480863707922, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 396606531.

It is not an unprimeable number, because it can be changed into a prime (396606533) 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, 66101086 + ... + 66101091.

It is an arithmetic number, because the mean of its divisors is an integer number (132202178).

Almost surely, 2^396606531 is an apocalyptic number.

396606531 is a deficient number, since it is larger than the sum of its proper divisors (132202181).

396606531 is a wasteful number, since it uses less digits than its factorization.

396606531 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 132202180.

The product of its (nonzero) digits is 87480, while the sum is 39.

The square root of 396606531 is about 19914.9825759402. The cubic root of 396606531 is about 734.7167718028.

The spelling of 396606531 in words is "three hundred ninety-six million, six hundred six thousand, five hundred thirty-one".