1604367431 has 4 divisors (see below), whose sum is σ = 1604566200. Its totient is φ = 1604168664.

The previous prime is 1604367421. The next prime is 1604367439. The reversal of 1604367431 is 1347634061.

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-1604367431 is a prime.

It is a super-2 number, since 2×1604367431² = 5147989707307079522, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1604367391 and 1604367400.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1604367439) 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, 86741 + ... + 103598.

It is an arithmetic number, because the mean of its divisors is an integer number (401141550).

Almost surely, 2^1604367431 is an apocalyptic number.

1604367431 is a deficient number, since it is larger than the sum of its proper divisors (198769).

1604367431 is an equidigital number, since it uses as much as digits as its factorization.

1604367431 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 198768.

The product of its (nonzero) digits is 36288, while the sum is 35.

The square root of 1604367431 is about 40054.5556834675. Note that the first 3 decimals coincide. The cubic root of 1604367431 is about 1170.6703322611.

The spelling of 1604367431 in words is "one billion, six hundred four million, three hundred sixty-seven thousand, four hundred thirty-one".