77942194 has 16 divisors (see below), whose sum is σ = 128715840. Its totient is φ = 35102160.

The previous prime is 77942191. The next prime is 77942197. The reversal of 77942194 is 49124977.

It is an interprime number because it is at equal distance from previous prime (77942191) and next prime (77942197).

It is a self number, because there is not a number n which added to its sum of digits gives 77942194.

It is not an unprimeable number, because it can be changed into a prime (77942191) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 13854 + ... + 18649.

It is an arithmetic number, because the mean of its divisors is an integer number (8044740).

Almost surely, 2^77942194 is an apocalyptic number.

77942194 is a deficient number, since it is larger than the sum of its proper divisors (50773646).

77942194 is a wasteful number, since it uses less digits than its factorization.

77942194 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 32625.

The product of its digits is 127008, while the sum is 43.

The square root of 77942194 is about 8828.4876394544. The cubic root of 77942194 is about 427.1602928080.

The spelling of 77942194 in words is "seventy-seven million, nine hundred forty-two thousand, one hundred ninety-four".