80798149 has 4 divisors (see below), whose sum is σ = 84311136. Its totient is φ = 77285164.

The previous prime is 80798143. The next prime is 80798173. The reversal of 80798149 is 94189708.

It is a happy number.

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 80798149 - 2⁵ = 80798117 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 80798099 and 80798108.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (80798143) 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, 1756459 + ... + 1756504.

It is an arithmetic number, because the mean of its divisors is an integer number (21077784).

Almost surely, 2^80798149 is an apocalyptic number.

It is an amenable number.

80798149 is a deficient number, since it is larger than the sum of its proper divisors (3512987).

80798149 is a wasteful number, since it uses less digits than its factorization.

80798149 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3512986.

The product of its (nonzero) digits is 145152, while the sum is 46.

The square root of 80798149 is about 8988.7790605844. The cubic root of 80798149 is about 432.3151653201.

The spelling of 80798149 in words is "eighty million, seven hundred ninety-eight thousand, one hundred forty-nine".