141778643 has 2 divisors, whose sum is σ = 141778644. Its totient is φ = 141778642.

The previous prime is 141778621. The next prime is 141778699. The reversal of 141778643 is 346877141.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 141778643 - 2¹⁸ = 141516499 is a prime.

It is a super-2 number, since 2×141778643² = 40202367221842898, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 141778643.

It is not a weakly prime, because it can be changed into another prime (141778603) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 70889321 + 70889322.

It is an arithmetic number, because the mean of its divisors is an integer number (70889322).

Almost surely, 2^141778643 is an apocalyptic number.

141778643 is a deficient number, since it is larger than the sum of its proper divisors (1).

141778643 is an equidigital number, since it uses as much as digits as its factorization.

141778643 is an evil number, because the sum of its binary digits is even.

The product of its digits is 112896, while the sum is 41.

The square root of 141778643 is about 11907.0837319639. The cubic root of 141778643 is about 521.4391138849.

The spelling of 141778643 in words is "one hundred forty-one million, seven hundred seventy-eight thousand, six hundred forty-three".