77157743 has 4 divisors (see below), whose sum is σ = 83092968. Its totient is φ = 71222520.

The previous prime is 77157737. The next prime is 77157757. The reversal of 77157743 is 34775177.

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

It is a cyclic number.

It is not a de Polignac number, because 77157743 - 2¹² = 77153647 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 77157743.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (77157763) 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, 2967593 + ... + 2967618.

It is an arithmetic number, because the mean of its divisors is an integer number (20773242).

Almost surely, 2^77157743 is an apocalyptic number.

77157743 is a deficient number, since it is larger than the sum of its proper divisors (5935225).

77157743 is a wasteful number, since it uses less digits than its factorization.

77157743 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5935224.

The product of its digits is 144060, while the sum is 41.

The square root of 77157743 is about 8783.9480303563. The cubic root of 77157743 is about 425.7224032172.

The spelling of 77157743 in words is "seventy-seven million, one hundred fifty-seven thousand, seven hundred forty-three".