1604877897 has 8 divisors (see below), whose sum is σ = 2445528256. Its totient is φ = 917073072.

The previous prime is 1604877889. The next prime is 1604877919. The reversal of 1604877897 is 7987784061.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 1604877897 - 2³ = 1604877889 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1604877817) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 38211358 + ... + 38211399.

It is an arithmetic number, because the mean of its divisors is an integer number (305691032).

Almost surely, 2^1604877897 is an apocalyptic number.

It is an amenable number.

1604877897 is a deficient number, since it is larger than the sum of its proper divisors (840650359).

1604877897 is an equidigital number, since it uses as much as digits as its factorization.

1604877897 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 76422767.

The product of its (nonzero) digits is 4741632, while the sum is 57.

The square root of 1604877897 is about 40060.9273107850. The cubic root of 1604877897 is about 1170.7944775624.

The spelling of 1604877897 in words is "one billion, six hundred four million, eight hundred seventy-seven thousand, eight hundred ninety-seven".