1640950229 has 2 divisors, whose sum is σ = 1640950230. Its totient is φ = 1640950228.

The previous prime is 1640950139. The next prime is 1640950237. The reversal of 1640950229 is 9220590461.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1438457329 + 202492900 = 37927^2 + 14230^2 .

It is an emirp because it is prime and its reverse (9220590461) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1640950229 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1640950192 and 1640950201.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1640940229) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 820475114 + 820475115.

It is an arithmetic number, because the mean of its divisors is an integer number (820475115).

Almost surely, 2^1640950229 is an apocalyptic number.

It is an amenable number.

1640950229 is a deficient number, since it is larger than the sum of its proper divisors (1).

1640950229 is an equidigital number, since it uses as much as digits as its factorization.

1640950229 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 38880, while the sum is 38.

The square root of 1640950229 is about 40508.6438800412. The cubic root of 1640950229 is about 1179.5014241976.

The spelling of 1640950229 in words is "one billion, six hundred forty million, nine hundred fifty thousand, two hundred twenty-nine".