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988666531 is a prime number
BaseRepresentation
bin111010111011011…
…101101010100011
32112220100110111221
4322323131222203
54011044312111
6242034315511
733333345466
oct7273355243
92486313457
10988666531
11468092886
12237128b97
13129a9c6a8
149543b2dd
155bbe3371
hex3aeddaa3

988666531 has 2 divisors, whose sum is σ = 988666532. Its totient is φ = 988666530.

The previous prime is 988666513. The next prime is 988666537. The reversal of 988666531 is 135666889.

Together with previous prime (988666513) it forms an Ormiston pair, because they use the same digits, order apart.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 988666531 - 27 = 988666403 is a prime.

It is a super-2 number, since 2×9886665312 = 1954923019039147922, which contains 22 as substring.

It is a nialpdrome in base 10.

It is not a weakly prime, because it can be changed into another prime (988666537) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 494333265 + 494333266.

It is an arithmetic number, because the mean of its divisors is an integer number (494333266).

Almost surely, 2988666531 is an apocalyptic number.

988666531 is a deficient number, since it is larger than the sum of its proper divisors (1).

988666531 is an equidigital number, since it uses as much as digits as its factorization.

988666531 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1866240, while the sum is 52.

The square root of 988666531 is about 31443.0680913934. The cubic root of 988666531 is about 996.2078145072.

The spelling of 988666531 in words is "nine hundred eighty-eight million, six hundred sixty-six thousand, five hundred thirty-one".