3445631921 has 2 divisors, whose sum is σ = 3445631922. Its totient is φ = 3445631920.

The previous prime is 3445631881. The next prime is 3445631933. The reversal of 3445631921 is 1291365443.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 3131633521 + 313998400 = 55961^2 + 17720^2 .

It is a cyclic number.

It is not a de Polignac number, because 3445631921 - 2¹⁸ = 3445369777 is a prime.

It is not a weakly prime, because it can be changed into another prime (3445630921) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1722815960 + 1722815961.

It is an arithmetic number, because the mean of its divisors is an integer number (1722815961).

Almost surely, 2^3445631921 is an apocalyptic number.

It is an amenable number.

3445631921 is a deficient number, since it is larger than the sum of its proper divisors (1).

3445631921 is an equidigital number, since it uses as much as digits as its factorization.

3445631921 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 77760, while the sum is 38.

The square root of 3445631921 is about 58699.5052875235. The cubic root of 3445631921 is about 1510.3918286406.

The spelling of 3445631921 in words is "three billion, four hundred forty-five million, six hundred thirty-one thousand, nine hundred twenty-one".