77438943 has 8 divisors (see below), whose sum is σ = 114724400. Its totient is φ = 51625944.

The previous prime is 77438807. The next prime is 77438957. The reversal of 77438943 is 34983477.

It is a happy number.

It is not a de Polignac number, because 77438943 - 2¹⁷ = 77307871 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (77428943) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1434028 + ... + 1434081.

It is an arithmetic number, because the mean of its divisors is an integer number (14340550).

Almost surely, 2^77438943 is an apocalyptic number.

77438943 is a deficient number, since it is larger than the sum of its proper divisors (37285457).

77438943 is a wasteful number, since it uses less digits than its factorization.

77438943 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2868118 (or 2868112 counting only the distinct ones).

The product of its digits is 508032, while the sum is 45.

The square root of 77438943 is about 8799.9399429769. The cubic root of 77438943 is about 426.2389554045.

The spelling of 77438943 in words is "seventy-seven million, four hundred thirty-eight thousand, nine hundred forty-three".