80783746 has 4 divisors (see below), whose sum is σ = 121175622. Its totient is φ = 40391872.

The previous prime is 80783707. The next prime is 80783749. The reversal of 80783746 is 64738708.

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., 60668521 + 20115225 = 7789^2 + 4485^2 .

It is not an unprimeable number, because it can be changed into a prime (80783749) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20195935 + ... + 20195938.

Almost surely, 2^80783746 is an apocalyptic number.

80783746 is a deficient number, since it is larger than the sum of its proper divisors (40391876).

80783746 is a wasteful number, since it uses less digits than its factorization.

80783746 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 40391875.

The product of its (nonzero) digits is 225792, while the sum is 43.

The square root of 80783746 is about 8987.9778593408. The cubic root of 80783746 is about 432.2894757656.

The spelling of 80783746 in words is "eighty million, seven hundred eighty-three thousand, seven hundred forty-six".