80740071 has 20 divisors (see below), whose sum is σ = 121242000. Its totient is φ = 53545536.

The previous prime is 80740057. The next prime is 80740091. The reversal of 80740071 is 17004708.

It is not a de Polignac number, because 80740071 - 2⁵ = 80740039 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (80740091) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 13615 + ... + 18623.

It is an arithmetic number, because the mean of its divisors is an integer number (6062100).

Almost surely, 2^80740071 is an apocalyptic number.

80740071 is a gapful number since it is divisible by the number (81) formed by its first and last digit.

80740071 is a deficient number, since it is larger than the sum of its proper divisors (40501929).

80740071 is a wasteful number, since it uses less digits than its factorization.

80740071 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5220 (or 5211 counting only the distinct ones).

The product of its (nonzero) digits is 1568, while the sum is 27.

The square root of 80740071 is about 8985.5478964836. The cubic root of 80740071 is about 432.2115572598.

Adding to 80740071 its reverse (17004708), we get a palindrome (97744779).

The spelling of 80740071 in words is "eighty million, seven hundred forty thousand, seventy-one".