406619491 has 4 divisors (see below), whose sum is σ = 406853992. Its totient is φ = 406384992.

The previous prime is 406619483. The next prime is 406619497. The reversal of 406619491 is 194916604.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 406619491 - 2³ = 406619483 is a prime.

It is a super-2 number, since 2×406619491² = 330678820922198162, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (406619497) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 114630 + ... + 118123.

It is an arithmetic number, because the mean of its divisors is an integer number (101713498).

Almost surely, 2^406619491 is an apocalyptic number.

406619491 is a deficient number, since it is larger than the sum of its proper divisors (234501).

406619491 is a wasteful number, since it uses less digits than its factorization.

406619491 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 234500.

The product of its (nonzero) digits is 46656, while the sum is 40.

The square root of 406619491 is about 20164.8082311734. The cubic root of 406619491 is about 740.8484856035.

The spelling of 406619491 in words is "four hundred six million, six hundred nineteen thousand, four hundred ninety-one".