2190916993 has 2 divisors, whose sum is σ = 2190916994. Its totient is φ = 2190916992.

The previous prime is 2190916979. The next prime is 2190917011. The reversal of 2190916993 is 3996190912.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1968519424 + 222397569 = 44368^2 + 14913^2 .

It is a cyclic number.

It is not a de Polignac number, because 2190916993 - 2¹⁷ = 2190785921 is a prime.

It is not a weakly prime, because it can be changed into another prime (2190916963) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1095458496 + 1095458497.

It is an arithmetic number, because the mean of its divisors is an integer number (1095458497).

Almost surely, 2^2190916993 is an apocalyptic number.

It is an amenable number.

2190916993 is a deficient number, since it is larger than the sum of its proper divisors (1).

2190916993 is an equidigital number, since it uses as much as digits as its factorization.

2190916993 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 236196, while the sum is 49.

The square root of 2190916993 is about 46807.2322723743. The cubic root of 2190916993 is about 1298.7990868208.

The spelling of 2190916993 in words is "two billion, one hundred ninety million, nine hundred sixteen thousand, nine hundred ninety-three".