1901105623 has 2 divisors, whose sum is σ = 1901105624. Its totient is φ = 1901105622.

The previous prime is 1901105617. The next prime is 1901105653. The reversal of 1901105623 is 3265011091.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1901105623 - 2⁹ = 1901105111 is a prime.

It is a super-2 number, since 2×1901105623² = 7228405179604436258, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 1901105591 and 1901105600.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1901105653) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 950552811 + 950552812.

It is an arithmetic number, because the mean of its divisors is an integer number (950552812).

Almost surely, 2^1901105623 is an apocalyptic number.

1901105623 is a deficient number, since it is larger than the sum of its proper divisors (1).

1901105623 is an equidigital number, since it uses as much as digits as its factorization.

1901105623 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1620, while the sum is 28.

The square root of 1901105623 is about 43601.6699565510. The cubic root of 1901105623 is about 1238.8025256769.

The spelling of 1901105623 in words is "one billion, nine hundred one million, one hundred five thousand, six hundred twenty-three".