101000001943 has 2 divisors, whose sum is σ = 101000001944. Its totient is φ = 101000001942.

The previous prime is 101000001931. The next prime is 101000001967. The reversal of 101000001943 is 349100000101.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-101000001943 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 101000001943.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (101000001043) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 50500000971 + 50500000972.

It is an arithmetic number, because the mean of its divisors is an integer number (50500000972).

Almost surely, 2^101000001943 is an apocalyptic number.

101000001943 is a deficient number, since it is larger than the sum of its proper divisors (1).

101000001943 is an equidigital number, since it uses as much as digits as its factorization.

101000001943 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 108, while the sum is 19.

The spelling of 101000001943 in words is "one hundred one billion, one thousand, nine hundred forty-three".