80781901 has 8 divisors (see below), whose sum is σ = 85244000. Its totient is φ = 76340880.

The previous prime is 80781893. The next prime is 80781917. The reversal of 80781901 is 10918708.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 80781901 - 2³ = 80781893 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (80781301) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2950 + ... + 13048.

It is an arithmetic number, because the mean of its divisors is an integer number (10655500).

Almost surely, 2^80781901 is an apocalyptic number.

80781901 is the 4020-th centered decagonal number.

It is an amenable number.

80781901 is a deficient number, since it is larger than the sum of its proper divisors (4462099).

80781901 is a wasteful number, since it uses less digits than its factorization.

80781901 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10539.

The product of its (nonzero) digits is 4032, while the sum is 34.

The square root of 80781901 is about 8987.8752216528. The cubic root of 80781901 is about 432.2861847564.

The spelling of 80781901 in words is "eighty million, seven hundred eighty-one thousand, nine hundred one".