1606404431 has 2 divisors, whose sum is σ = 1606404432. Its totient is φ = 1606404430.

The previous prime is 1606404403. The next prime is 1606404461. The reversal of 1606404431 is 1344046061.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1606404431 - 2⁶ = 1606404367 is a prime.

It is a super-2 number, since 2×1606404431² = 5161070391872867522, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 1606404394 and 1606404403.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1606404461) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 803202215 + 803202216.

It is an arithmetic number, because the mean of its divisors is an integer number (803202216).

Almost surely, 2^1606404431 is an apocalyptic number.

1606404431 is a deficient number, since it is larger than the sum of its proper divisors (1).

1606404431 is an equidigital number, since it uses as much as digits as its factorization.

1606404431 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 6912, while the sum is 29.

The square root of 1606404431 is about 40079.9754366192. The cubic root of 1606404431 is about 1171.1655735420.

The spelling of 1606404431 in words is "one billion, six hundred six million, four hundred four thousand, four hundred thirty-one".