1690444831 has 2 divisors, whose sum is σ = 1690444832. Its totient is φ = 1690444830.

The previous prime is 1690444799. The next prime is 1690444837. The reversal of 1690444831 is 1384440961.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1690444831 - 2⁵ = 1690444799 is a prime.

It is a super-2 number, since 2×1690444831² = 5715207453309237122, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1690444837) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 845222415 + 845222416.

It is an arithmetic number, because the mean of its divisors is an integer number (845222416).

Almost surely, 2^1690444831 is an apocalyptic number.

1690444831 is a deficient number, since it is larger than the sum of its proper divisors (1).

1690444831 is an equidigital number, since it uses as much as digits as its factorization.

1690444831 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 82944, while the sum is 40.

The square root of 1690444831 is about 41115.0195305803. The cubic root of 1690444831 is about 1191.2429239766.

The spelling of 1690444831 in words is "one billion, six hundred ninety million, four hundred forty-four thousand, eight hundred thirty-one".