80725919 has 2 divisors, whose sum is σ = 80725920. Its totient is φ = 80725918.

The previous prime is 80725903. The next prime is 80725933. The reversal of 80725919 is 91952708.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 80725919 - 2⁴ = 80725903 is a prime.

It is a super-2 number, since 2×80725919² = 13033347996789122, which contains 22 as substring.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (80725949) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 40362959 + 40362960.

It is an arithmetic number, because the mean of its divisors is an integer number (40362960).

Almost surely, 2^80725919 is an apocalyptic number.

80725919 is a deficient number, since it is larger than the sum of its proper divisors (1).

80725919 is an equidigital number, since it uses as much as digits as its factorization.

80725919 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 45360, while the sum is 41.

The square root of 80725919 is about 8984.7603752131. The cubic root of 80725919 is about 432.1863033171.

The spelling of 80725919 in words is "eighty million, seven hundred twenty-five thousand, nine hundred nineteen".