438373964949971 has 2 divisors, whose sum is σ = 438373964949972. Its totient is φ = 438373964949970.

The previous prime is 438373964949959. The next prime is 438373964950007. The reversal of 438373964949971 is 179949469373834.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-438373964949971 is a prime.

It is not a weakly prime, because it can be changed into another prime (438373964949941) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 219186982474985 + 219186982474986.

It is an arithmetic number, because the mean of its divisors is an integer number (219186982474986).

Almost surely, 2^{438373964949971} is an apocalyptic number.

438373964949971 is a deficient number, since it is larger than the sum of its proper divisors (1).

438373964949971 is an equidigital number, since it uses as much as digits as its factorization.

438373964949971 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 26665583616, while the sum is 86.

The spelling of 438373964949971 in words is "four hundred thirty-eight trillion, three hundred seventy-three billion, nine hundred sixty-four million, nine hundred forty-nine thousand, nine hundred seventy-one".