80987757 has 4 divisors (see below), whose sum is σ = 107983680. Its totient is φ = 53991836.

The previous prime is 80987741. The next prime is 80987827. The reversal of 80987757 is 75778908.

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 80987757 - 2⁴ = 80987741 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (80987057) 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, 13497957 + ... + 13497962.

It is an arithmetic number, because the mean of its divisors is an integer number (26995920).

Almost surely, 2^80987757 is an apocalyptic number.

It is an amenable number.

80987757 is a deficient number, since it is larger than the sum of its proper divisors (26995923).

80987757 is a wasteful number, since it uses less digits than its factorization.

80987757 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26995922.

The product of its (nonzero) digits is 987840, while the sum is 51.

The square root of 80987757 is about 8999.3198076299. The cubic root of 80987757 is about 432.6530706586.

The spelling of 80987757 in words is "eighty million, nine hundred eighty-seven thousand, seven hundred fifty-seven".