1690050623 has 2 divisors, whose sum is σ = 1690050624. Its totient is φ = 1690050622.

The previous prime is 1690050617. The next prime is 1690050641. The reversal of 1690050623 is 3260500961.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1690050623 is a prime.

It is a super-2 number, since 2×1690050623² = 5712542216605376258, which contains 22 as substring.

It is a Sophie Germain prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1690050623.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1690050613) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 845025311 + 845025312.

It is an arithmetic number, because the mean of its divisors is an integer number (845025312).

Almost surely, 2^1690050623 is an apocalyptic number.

1690050623 is a deficient number, since it is larger than the sum of its proper divisors (1).

1690050623 is an equidigital number, since it uses as much as digits as its factorization.

1690050623 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 9720, while the sum is 32.

The square root of 1690050623 is about 41110.2252852012. The cubic root of 1690050623 is about 1191.1503183717.

The spelling of 1690050623 in words is "one billion, six hundred ninety million, fifty thousand, six hundred twenty-three".