2345664421 has 2 divisors, whose sum is σ = 2345664422. Its totient is φ = 2345664420.

The previous prime is 2345664359. The next prime is 2345664457. The reversal of 2345664421 is 1244665432.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1754688321 + 590976100 = 41889^2 + 24310^2 .

It is a cyclic number.

It is not a de Polignac number, because 2345664421 - 2⁹ = 2345663909 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2345664481) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1172832210 + 1172832211.

It is an arithmetic number, because the mean of its divisors is an integer number (1172832211).

Almost surely, 2^2345664421 is an apocalyptic number.

It is an amenable number.

2345664421 is a deficient number, since it is larger than the sum of its proper divisors (1).

2345664421 is an equidigital number, since it uses as much as digits as its factorization.

2345664421 is an evil number, because the sum of its binary digits is even.

The product of its digits is 138240, while the sum is 37.

The square root of 2345664421 is about 48432.0598467585. The cubic root of 2345664421 is about 1328.6847798740.

The spelling of 2345664421 in words is "two billion, three hundred forty-five million, six hundred sixty-four thousand, four hundred twenty-one".