80781489 has 8 divisors (see below), whose sum is σ = 119676320. Its totient is φ = 53854308.

The previous prime is 80781409. The next prime is 80781511. The reversal of 80781489 is 98418708.

It is a de Polignac number, because none of the positive numbers 2^k-80781489 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (80781409) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1495927 + ... + 1495980.

It is an arithmetic number, because the mean of its divisors is an integer number (14959540).

Almost surely, 2^80781489 is an apocalyptic number.

It is an amenable number.

80781489 is a deficient number, since it is larger than the sum of its proper divisors (38894831).

80781489 is a wasteful number, since it uses less digits than its factorization.

80781489 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2991916 (or 2991910 counting only the distinct ones).

The product of its (nonzero) digits is 129024, while the sum is 45.

The square root of 80781489 is about 8987.8523018572. The cubic root of 80781489 is about 432.2854498467.

The spelling of 80781489 in words is "eighty million, seven hundred eighty-one thousand, four hundred eighty-nine".