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85072439 is a prime number
BaseRepresentation
bin1010001001000…
…01101000110111
312221002010110002
411010201220313
5133234304224
612235221515
72052050414
oct504415067
9187063402
1085072439
1144026201
12245a789b
131481812a
14b42710b
1577069ae
hex5121a37

85072439 has 2 divisors, whose sum is σ = 85072440. Its totient is φ = 85072438.

The previous prime is 85072387. The next prime is 85072451. The reversal of 85072439 is 93427058.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 85072439 - 216 = 85006903 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (85072459) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 42536219 + 42536220.

It is an arithmetic number, because the mean of its divisors is an integer number (42536220).

Almost surely, 285072439 is an apocalyptic number.

85072439 is a deficient number, since it is larger than the sum of its proper divisors (1).

85072439 is an equidigital number, since it uses as much as digits as its factorization.

85072439 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 60480, while the sum is 38.

The square root of 85072439 is about 9223.4721770058. The cubic root of 85072439 is about 439.8078344743.

The spelling of 85072439 in words is "eighty-five million, seventy-two thousand, four hundred thirty-nine".