1690738141 has 2 divisors, whose sum is σ = 1690738142. Its totient is φ = 1690738140.

The previous prime is 1690738121. The next prime is 1690738157. The reversal of 1690738141 is 1418370961.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 875864025 + 814874116 = 29595^2 + 28546^2 .

It is a cyclic number.

It is not a de Polignac number, because 1690738141 - 2¹⁷ = 1690607069 is a prime.

It is a super-2 number, since 2×1690738141² = 5717190922864271762, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 1690738094 and 1690738103.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1690738121) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 845369070 + 845369071.

It is an arithmetic number, because the mean of its divisors is an integer number (845369071).

Almost surely, 2^1690738141 is an apocalyptic number.

It is an amenable number.

1690738141 is a deficient number, since it is larger than the sum of its proper divisors (1).

1690738141 is an equidigital number, since it uses as much as digits as its factorization.

1690738141 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 36288, while the sum is 40.

The square root of 1690738141 is about 41118.5863205437. The cubic root of 1690738141 is about 1191.3118177275.

The spelling of 1690738141 in words is "one billion, six hundred ninety million, seven hundred thirty-eight thousand, one hundred forty-one".