1642431067 has 2 divisors, whose sum is σ = 1642431068. Its totient is φ = 1642431066.

The previous prime is 1642431017. The next prime is 1642431101. The reversal of 1642431067 is 7601342461.

It is an a-pointer prime, because the next prime (1642431101) can be obtained adding 1642431067 to its sum of digits (34).

It is a strong prime.

It is an emirp because it is prime and its reverse (7601342461) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1642431067 is a prime.

It is not a weakly prime, because it can be changed into another prime (1642431017) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 821215533 + 821215534.

It is an arithmetic number, because the mean of its divisors is an integer number (821215534).

Almost surely, 2^1642431067 is an apocalyptic number.

1642431067 is a deficient number, since it is larger than the sum of its proper divisors (1).

1642431067 is an equidigital number, since it uses as much as digits as its factorization.

1642431067 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 24192, while the sum is 34.

The square root of 1642431067 is about 40526.9178077978. The cubic root of 1642431067 is about 1179.8561222163.

It can be divided in two parts, 164243 and 1067, that multiplied together give a triangular number (175247281 = T₁₈₇₂₁).

The spelling of 1642431067 in words is "one billion, six hundred forty-two million, four hundred thirty-one thousand, sixty-seven".