1642733129 has 2 divisors, whose sum is σ = 1642733130. Its totient is φ = 1642733128.

The previous prime is 1642733119. The next prime is 1642733167. The reversal of 1642733129 is 9213372461.

It is an a-pointer prime, because the next prime (1642733167) can be obtained adding 1642733129 to its sum of digits (38).

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1501717504 + 141015625 = 38752^2 + 11875^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1642733129 is a prime.

It is a super-2 number, since 2×1642733129² = 5397144266228261282, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 1642733092 and 1642733101.

It is not a weakly prime, because it can be changed into another prime (1642733119) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 821366564 + 821366565.

It is an arithmetic number, because the mean of its divisors is an integer number (821366565).

Almost surely, 2^1642733129 is an apocalyptic number.

It is an amenable number.

1642733129 is a deficient number, since it is larger than the sum of its proper divisors (1).

1642733129 is an equidigital number, since it uses as much as digits as its factorization.

1642733129 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 54432, while the sum is 38.

The square root of 1642733129 is about 40530.6443200697. The cubic root of 1642733129 is about 1179.9284474951.

The spelling of 1642733129 in words is "one billion, six hundred forty-two million, seven hundred thirty-three thousand, one hundred twenty-nine".