2758345921 has 2 divisors, whose sum is σ = 2758345922. Its totient is φ = 2758345920.

The previous prime is 2758345913. The next prime is 2758345927. The reversal of 2758345921 is 1295438572.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 2734139521 + 24206400 = 52289^2 + 4920^2 .

It is a cyclic number.

It is not a de Polignac number, because 2758345921 - 2³ = 2758345913 is a prime.

It is not a weakly prime, because it can be changed into another prime (2758345927) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1379172960 + 1379172961.

It is an arithmetic number, because the mean of its divisors is an integer number (1379172961).

Almost surely, 2^2758345921 is an apocalyptic number.

It is an amenable number.

2758345921 is a deficient number, since it is larger than the sum of its proper divisors (1).

2758345921 is an equidigital number, since it uses as much as digits as its factorization.

2758345921 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 604800, while the sum is 46.

The square root of 2758345921 is about 52519.9573590840. The cubic root of 2758345921 is about 1402.4355429763.

The spelling of 2758345921 in words is "two billion, seven hundred fifty-eight million, three hundred forty-five thousand, nine hundred twenty-one".