80897719 has 4 divisors (see below), whose sum is σ = 92454544. Its totient is φ = 69340896.

The previous prime is 80897701. The next prime is 80897723. The reversal of 80897719 is 91779808.

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

It is a cyclic number.

It is not a de Polignac number, because 80897719 - 2¹³ = 80889527 is a prime.

It is a super-2 number, since 2×80897719² = 13088881878805922, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (80897779) 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, 5778402 + ... + 5778415.

It is an arithmetic number, because the mean of its divisors is an integer number (23113636).

Almost surely, 2^80897719 is an apocalyptic number.

80897719 is a deficient number, since it is larger than the sum of its proper divisors (11556825).

80897719 is a wasteful number, since it uses less digits than its factorization.

80897719 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11556824.

The product of its (nonzero) digits is 254016, while the sum is 49.

The square root of 80897719 is about 8994.3159272954. The cubic root of 80897719 is about 432.4926774351.

The spelling of 80897719 in words is "eighty million, eight hundred ninety-seven thousand, seven hundred nineteen".