77091142 has 8 divisors (see below), whose sum is σ = 116519832. Its totient is φ = 38251200.

The previous prime is 77091137. The next prime is 77091143. The reversal of 77091142 is 24119077.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (77091143) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 146859 + ... + 147382.

It is an arithmetic number, because the mean of its divisors is an integer number (14564979).

Almost surely, 2^77091142 is an apocalyptic number.

77091142 is a deficient number, since it is larger than the sum of its proper divisors (39428690).

77091142 is a wasteful number, since it uses less digits than its factorization.

77091142 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 294374.

The product of its (nonzero) digits is 3528, while the sum is 31.

The square root of 77091142 is about 8780.1561489532. The cubic root of 77091142 is about 425.5998763061.

The spelling of 77091142 in words is "seventy-seven million, ninety-one thousand, one hundred forty-two".