409925887 has 4 divisors (see below), whose sum is σ = 468486736. Its totient is φ = 351365040.

The previous prime is 409925851. The next prime is 409925897. The reversal of 409925887 is 788529904.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-409925887 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 (409925807) 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, 29280414 + ... + 29280427.

It is an arithmetic number, because the mean of its divisors is an integer number (117121684).

Almost surely, 2^409925887 is an apocalyptic number.

409925887 is a deficient number, since it is larger than the sum of its proper divisors (58560849).

409925887 is an equidigital number, since it uses as much as digits as its factorization.

409925887 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 58560848.

The product of its (nonzero) digits is 1451520, while the sum is 52.

The square root of 409925887 is about 20246.6265585159. The cubic root of 409925887 is about 742.8511186483.

The spelling of 409925887 in words is "four hundred nine million, nine hundred twenty-five thousand, eight hundred eighty-seven".