80918434 has 4 divisors (see below), whose sum is σ = 121377654. Its totient is φ = 40459216.

The previous prime is 80918407. The next prime is 80918437. The reversal of 80918434 is 43481908.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 67980025 + 12938409 = 8245^2 + 3597^2 .

It is a super-2 number, since 2×80918434² = 13095585922024712, which contains 22 as substring.

It is a nialpdrome in base 14.

It is a junction number, because it is equal to n+sod(n) for n = 80918393 and 80918402.

It is not an unprimeable number, because it can be changed into a prime (80918437) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20229607 + ... + 20229610.

Almost surely, 2^80918434 is an apocalyptic number.

80918434 is a deficient number, since it is larger than the sum of its proper divisors (40459220).

80918434 is a wasteful number, since it uses less digits than its factorization.

80918434 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 40459219.

The product of its (nonzero) digits is 27648, while the sum is 37.

The square root of 80918434 is about 8995.4674142037. The cubic root of 80918434 is about 432.5295895646.

The spelling of 80918434 in words is "eighty million, nine hundred eighteen thousand, four hundred thirty-four".