1043113921 has 2 divisors, whose sum is σ = 1043113922. Its totient is φ = 1043113920.

The previous prime is 1043113861. The next prime is 1043113949. The reversal of 1043113921 is 1293113401.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 856381696 + 186732225 = 29264^2 + 13665^2 .

It is an emirp because it is prime and its reverse (1293113401) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1043113921 - 2¹⁷ = 1042982849 is a prime.

It is not a weakly prime, because it can be changed into another prime (1043114921) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 521556960 + 521556961.

It is an arithmetic number, because the mean of its divisors is an integer number (521556961).

Almost surely, 2^1043113921 is an apocalyptic number.

It is an amenable number.

1043113921 is a deficient number, since it is larger than the sum of its proper divisors (1).

1043113921 is an equidigital number, since it uses as much as digits as its factorization.

1043113921 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 648, while the sum is 25.

The square root of 1043113921 is about 32297.2742038705. The cubic root of 1043113921 is about 1014.1695816470.

The spelling of 1043113921 in words is "one billion, forty-three million, one hundred thirteen thousand, nine hundred twenty-one".