1690724513 has 2 divisors, whose sum is σ = 1690724514. Its totient is φ = 1690724512.

The previous prime is 1690724489. The next prime is 1690724521. The reversal of 1690724513 is 3154270961.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1224510049 + 466214464 = 34993^2 + 21592^2 .

It is a cyclic number.

It is not a de Polignac number, because 1690724513 - 2¹⁸ = 1690462369 is a prime.

It is not a weakly prime, because it can be changed into another prime (1690724543) 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, 845362256 + 845362257.

It is an arithmetic number, because the mean of its divisors is an integer number (845362257).

Almost surely, 2^1690724513 is an apocalyptic number.

It is an amenable number.

1690724513 is a deficient number, since it is larger than the sum of its proper divisors (1).

1690724513 is an equidigital number, since it uses as much as digits as its factorization.

1690724513 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 45360, while the sum is 38.

The square root of 1690724513 is about 41118.4206043958. The cubic root of 1690724513 is about 1191.3086169084.

The spelling of 1690724513 in words is "one billion, six hundred ninety million, seven hundred twenty-four thousand, five hundred thirteen".