80420757 has 4 divisors (see below), whose sum is σ = 107227680. Its totient is φ = 53613836.

The previous prime is 80420737. The next prime is 80420773. The reversal of 80420757 is 75702408.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 80420757 - 2⁷ = 80420629 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (80420737) 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, 13403457 + ... + 13403462.

It is an arithmetic number, because the mean of its divisors is an integer number (26806920).

Almost surely, 2^80420757 is an apocalyptic number.

It is an amenable number.

80420757 is a deficient number, since it is larger than the sum of its proper divisors (26806923).

80420757 is a wasteful number, since it uses less digits than its factorization.

80420757 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26806922.

The product of its (nonzero) digits is 15680, while the sum is 33.

The square root of 80420757 is about 8967.7620954171. The cubic root of 80420757 is about 431.6410287409.

The spelling of 80420757 in words is "eighty million, four hundred twenty thousand, seven hundred fifty-seven".