1050001661903 has 2 divisors, whose sum is σ = 1050001661904. Its totient is φ = 1050001661902.

The previous prime is 1050001661899. The next prime is 1050001661923. The reversal of 1050001661903 is 3091661000501.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1050001661903 - 2² = 1050001661899 is a prime.

It is a super-2 number, since 2×1050001661903² (a number of 25 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 1050001661903.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1050001661923) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 525000830951 + 525000830952.

It is an arithmetic number, because the mean of its divisors is an integer number (525000830952).

Almost surely, 2^{1050001661903} is an apocalyptic number.

1050001661903 is a deficient number, since it is larger than the sum of its proper divisors (1).

1050001661903 is an equidigital number, since it uses as much as digits as its factorization.

1050001661903 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 4860, while the sum is 32.

The spelling of 1050001661903 in words is "one trillion, fifty billion, one million, six hundred sixty-one thousand, nine hundred three".