78131743 has 4 divisors (see below), whose sum is σ = 82243960. Its totient is φ = 74019528.

The previous prime is 78131741. The next prime is 78131747. The reversal of 78131743 is 34713187.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 34713187 = 23 ⋅1509269.

It is a cyclic number.

It is not a de Polignac number, because 78131743 - 2¹ = 78131741 is a prime.

It is a super-2 number, since 2×78131743² = 12209138528436098, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 78131699 and 78131708.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (78131741) 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, 2056080 + ... + 2056117.

It is an arithmetic number, because the mean of its divisors is an integer number (20560990).

Almost surely, 2^78131743 is an apocalyptic number.

78131743 is a deficient number, since it is larger than the sum of its proper divisors (4112217).

78131743 is a wasteful number, since it uses less digits than its factorization.

78131743 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4112216.

The product of its digits is 14112, while the sum is 34.

The square root of 78131743 is about 8839.2161982836. The cubic root of 78131743 is about 427.5062853743.

The spelling of 78131743 in words is "seventy-eight million, one hundred thirty-one thousand, seven hundred forty-three".