77099942 has 4 divisors (see below), whose sum is σ = 115649916. Its totient is φ = 38549970.

The previous prime is 77099941. The next prime is 77099959. The reversal of 77099942 is 24999077.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (77099941) 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 as a sum of consecutive naturals, namely, 19274984 + ... + 19274987.

It is an arithmetic number, because the mean of its divisors is an integer number (28912479).

Almost surely, 2^77099942 is an apocalyptic number.

77099942 is a deficient number, since it is larger than the sum of its proper divisors (38549974).

77099942 is a wasteful number, since it uses less digits than its factorization.

77099942 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 38549973.

The product of its (nonzero) digits is 285768, while the sum is 47.

The square root of 77099942 is about 8780.6572646927. The cubic root of 77099942 is about 425.6160698501.

The spelling of 77099942 in words is "seventy-seven million, ninety-nine thousand, nine hundred forty-two".