80621019 has 12 divisors (see below), whose sum is σ = 116688000. Its totient is φ = 53638704.

The previous prime is 80621017. The next prime is 80621059. The reversal of 80621019 is 91012608.

It is not a de Polignac number, because 80621019 - 2¹ = 80621017 is a prime.

It is a super-2 number, since 2×80621019² = 12999497409196722, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 80620983 and 80621001.

It is not an unprimeable number, because it can be changed into a prime (80621011) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 4219 + ... + 13380.

It is an arithmetic number, because the mean of its divisors is an integer number (9724000).

Almost surely, 2^80621019 is an apocalyptic number.

80621019 is a deficient number, since it is larger than the sum of its proper divisors (36066981).

80621019 is a wasteful number, since it uses less digits than its factorization.

80621019 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18114 (or 18111 counting only the distinct ones).

The product of its (nonzero) digits is 864, while the sum is 27.

The square root of 80621019 is about 8978.9208148864. The cubic root of 80621019 is about 431.9990194165. Note that the first 3 decimals are identical.

The spelling of 80621019 in words is "eighty million, six hundred twenty-one thousand, nineteen".