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80072901 = 3310129363
BaseRepresentation
bin1001100010111…
…01000011000101
312120200010101000
410301131003011
5130444313101
611540123513
71661415456
oct461350305
9176603330
1080072901
1141220a57
1222996599
131378761c
14a8c512d
15706a486
hex4c5d0c5

80072901 has 16 divisors (see below), whose sum is σ = 119805120. Its totient is φ = 52851600.

The previous prime is 80072893. The next prime is 80072903. The reversal of 80072901 is 10927008.

It is not a de Polignac number, because 80072901 - 23 = 80072893 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 (80072903) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 11955 + ... + 17408.

It is an arithmetic number, because the mean of its divisors is an integer number (7487820).

Almost surely, 280072901 is an apocalyptic number.

It is an amenable number.

80072901 is a deficient number, since it is larger than the sum of its proper divisors (39732219).

80072901 is a wasteful number, since it uses less digits than its factorization.

80072901 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 29473 (or 29467 counting only the distinct ones).

The product of its (nonzero) digits is 1008, while the sum is 27.

The square root of 80072901 is about 8948.3462717979. The cubic root of 80072901 is about 431.0177819728.

Adding to 80072901 its reverse (10927008), we get a palindrome (90999909).

The spelling of 80072901 in words is "eighty million, seventy-two thousand, nine hundred one".

Divisors: 1 3 9 27 101 303 909 2727 29363 88089 264267 792801 2965663 8896989 26690967 80072901