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31428757189 is a prime number
BaseRepresentation
bin11101010001010011…
…001100011011000101
310000010022202021210001
4131101103030123011
51003331230212224
622234351201301
72161556012464
oct352123143305
9100108667701
1031428757189
11123687944a5
126111516231
132c6b3a1c5b
1417420c49db
15c3e29e544
hex7514cc6c5

31428757189 has 2 divisors, whose sum is σ = 31428757190. Its totient is φ = 31428757188.

The previous prime is 31428757127. The next prime is 31428757193. The reversal of 31428757189 is 98175782413.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 17216064100 + 14212693089 = 131210^2 + 119217^2 .

It is a cyclic number.

It is not a de Polignac number, because 31428757189 - 227 = 31294539461 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (31428757589) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15714378594 + 15714378595.

It is an arithmetic number, because the mean of its divisors is an integer number (15714378595).

Almost surely, 231428757189 is an apocalyptic number.

It is an amenable number.

31428757189 is a deficient number, since it is larger than the sum of its proper divisors (1).

31428757189 is an equidigital number, since it uses as much as digits as its factorization.

31428757189 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 3386880, while the sum is 55.

The spelling of 31428757189 in words is "thirty-one billion, four hundred twenty-eight million, seven hundred fifty-seven thousand, one hundred eighty-nine".