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87157901329 is a prime number
BaseRepresentation
bin101000100101100000…
…1000000100000010001
322022222011222010200121
41101023001000200101
52411444410320304
6104012332150241
76203565636412
oct1211301004021
9268864863617
1087157901329
1133a663aa314
1214a85008381
1382b00751a5
14430b679809
152401ac8554
hex144b040811

87157901329 has 2 divisors, whose sum is σ = 87157901330. Its totient is φ = 87157901328.

The previous prime is 87157901309. The next prime is 87157901399. The reversal of 87157901329 is 92310975178.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 52404366400 + 34753534929 = 228920^2 + 186423^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2k-87157901329 is a prime.

It is not a weakly prime, because it can be changed into another prime (87157901309) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 43578950664 + 43578950665.

It is an arithmetic number, because the mean of its divisors is an integer number (43578950665).

Almost surely, 287157901329 is an apocalyptic number.

It is an amenable number.

87157901329 is a deficient number, since it is larger than the sum of its proper divisors (1).

87157901329 is an equidigital number, since it uses as much as digits as its factorization.

87157901329 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 952560, while the sum is 52.

The spelling of 87157901329 in words is "eighty-seven billion, one hundred fifty-seven million, nine hundred one thousand, three hundred twenty-nine".