409947087 has 16 divisors (see below), whose sum is σ = 612404352. Its totient is φ = 241737120.

The previous prime is 409947029. The next prime is 409947137. The reversal of 409947087 is 780749904.

It is a happy number.

It is not a de Polignac number, because 409947087 - 2¹² = 409942991 is a prime.

It is a super-2 number, since 2×409947087² = 336113228279571138, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (409947017) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 166653 + ... + 169094.

It is an arithmetic number, because the mean of its divisors is an integer number (38275272).

Almost surely, 2^409947087 is an apocalyptic number.

409947087 is a deficient number, since it is larger than the sum of its proper divisors (202457265).

409947087 is a wasteful number, since it uses less digits than its factorization.

409947087 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 335798.

The product of its (nonzero) digits is 508032, while the sum is 48.

The square root of 409947087 is about 20247.1500957542. The cubic root of 409947087 is about 742.8639243552.

The spelling of 409947087 in words is "four hundred nine million, nine hundred forty-seven thousand, eighty-seven".