1642101827 has 2 divisors, whose sum is σ = 1642101828. Its totient is φ = 1642101826.

The previous prime is 1642101763. The next prime is 1642101833. The reversal of 1642101827 is 7281012461.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1642101827 - 2⁶ = 1642101763 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1642101793 and 1642101802.

It is not a weakly prime, because it can be changed into another prime (1642161827) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 821050913 + 821050914.

It is an arithmetic number, because the mean of its divisors is an integer number (821050914).

Almost surely, 2^1642101827 is an apocalyptic number.

1642101827 is a deficient number, since it is larger than the sum of its proper divisors (1).

1642101827 is an equidigital number, since it uses as much as digits as its factorization.

1642101827 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 5376, while the sum is 32.

The square root of 1642101827 is about 40522.8556126046. The cubic root of 1642101827 is about 1179.7772793764. Note that the first 3 decimals are identical.

The spelling of 1642101827 in words is "one billion, six hundred forty-two million, one hundred one thousand, eight hundred twenty-seven".