999670943 has 2 divisors, whose sum is σ = 999670944. Its totient is φ = 999670942.

The previous prime is 999670877. The next prime is 999670951. The reversal of 999670943 is 349076999.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 999670943 - 2¹⁰ = 999669919 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (999670993) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 499835471 + 499835472.

It is an arithmetic number, because the mean of its divisors is an integer number (499835472).

Almost surely, 2^999670943 is an apocalyptic number.

999670943 is a deficient number, since it is larger than the sum of its proper divisors (1).

999670943 is an equidigital number, since it uses as much as digits as its factorization.

999670943 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3306744, while the sum is 56.

The square root of 999670943 is about 31617.5733256049. The cubic root of 999670943 is about 999.8903023002.

The spelling of 999670943 in words is "nine hundred ninety-nine million, six hundred seventy thousand, nine hundred forty-three".