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72102077 is a prime number
BaseRepresentation
bin1000100110000…
…11000010111101
312000200011110022
410103003002331
5121424231302
611053221525
71533600065
oct423030275
9160604408
1072102077
11377773a3
12201918a5
1311c26568
14980c3a5
1564e38a2
hex44c30bd

72102077 has 2 divisors, whose sum is σ = 72102078. Its totient is φ = 72102076.

The previous prime is 72102059. The next prime is 72102113. The reversal of 72102077 is 77020127.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 70997476 + 1104601 = 8426^2 + 1051^2 .

It is a cyclic number.

It is not a de Polignac number, because 72102077 - 216 = 72036541 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (72102577) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 36051038 + 36051039.

It is an arithmetic number, because the mean of its divisors is an integer number (36051039).

Almost surely, 272102077 is an apocalyptic number.

It is an amenable number.

72102077 is a deficient number, since it is larger than the sum of its proper divisors (1).

72102077 is an equidigital number, since it uses as much as digits as its factorization.

72102077 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1372, while the sum is 26.

The square root of 72102077 is about 8491.2941887559. The cubic root of 72102077 is about 416.2132724375.

The spelling of 72102077 in words is "seventy-two million, one hundred two thousand, seventy-seven".