77940106 has 4 divisors (see below), whose sum is σ = 116910162. Its totient is φ = 38970052.

The previous prime is 77940103. The next prime is 77940143. The reversal of 77940106 is 60104977.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 74909025 + 3031081 = 8655^2 + 1741^2 .

It is not an unprimeable number, because it can be changed into a prime (77940101) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 19485025 + ... + 19485028.

Almost surely, 2^77940106 is an apocalyptic number.

77940106 is a deficient number, since it is larger than the sum of its proper divisors (38970056).

77940106 is a wasteful number, since it uses less digits than its factorization.

77940106 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 38970055.

The product of its (nonzero) digits is 10584, while the sum is 34.

The square root of 77940106 is about 8828.3693851130. The cubic root of 77940106 is about 427.1564783629.

The spelling of 77940106 in words is "seventy-seven million, nine hundred forty thousand, one hundred six".