1304390523 has 16 divisors (see below), whose sum is σ = 1783254816. Its totient is φ = 847599360.

The previous prime is 1304390519. The next prime is 1304390537. The reversal of 1304390523 is 3250934031.

It is not a de Polignac number, because 1304390523 - 2² = 1304390519 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1304390543) 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, 147865 + ... + 156437.

It is an arithmetic number, because the mean of its divisors is an integer number (111453426).

Almost surely, 2^1304390523 is an apocalyptic number.

1304390523 is a deficient number, since it is larger than the sum of its proper divisors (478864293).

1304390523 is a wasteful number, since it uses less digits than its factorization.

1304390523 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9854.

The product of its (nonzero) digits is 9720, while the sum is 30.

The square root of 1304390523 is about 36116.3470328880. The cubic root of 1304390523 is about 1092.6201654152.

The spelling of 1304390523 in words is "one billion, three hundred four million, three hundred ninety thousand, five hundred twenty-three".