943400947 has 2 divisors, whose sum is σ = 943400948. Its totient is φ = 943400946.

The previous prime is 943400921. The next prime is 943400963. The reversal of 943400947 is 749004349.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-943400947 is a prime.

It is not a weakly prime, because it can be changed into another prime (943400987) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 471700473 + 471700474.

It is an arithmetic number, because the mean of its divisors is an integer number (471700474).

Almost surely, 2^943400947 is an apocalyptic number.

943400947 is a deficient number, since it is larger than the sum of its proper divisors (1).

943400947 is an equidigital number, since it uses as much as digits as its factorization.

943400947 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 108864, while the sum is 40.

The square root of 943400947 is about 30714.8326871562. The cubic root of 943400947 is about 980.7660770307.

The spelling of 943400947 in words is "nine hundred forty-three million, four hundred thousand, nine hundred forty-seven".