102143997 has 20 divisors (see below), whose sum is σ = 156312156. Its totient is φ = 66432960.

The previous prime is 102143959. The next prime is 102144001. The reversal of 102143997 is 799341201.

It can be written as a sum of positive squares in 2 ways, for example, as 20169081 + 81974916 = 4491^2 + 9054^2 .

It is not a de Polignac number, because 102143997 - 2⁶ = 102143933 is a prime.

It is a super-2 number, since 2×102143997² = 20866792246272018, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (102143917) 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 in 19 ways as a sum of consecutive naturals, for example, 12058 + ... + 18699.

Almost surely, 2^102143997 is an apocalyptic number.

It is an amenable number.

102143997 is a deficient number, since it is larger than the sum of its proper divisors (54168159).

102143997 is an equidigital number, since it uses as much as digits as its factorization.

102143997 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30810 (or 30801 counting only the distinct ones).

The product of its (nonzero) digits is 13608, while the sum is 36.

The square root of 102143997 is about 10106.6313378890. The cubic root of 102143997 is about 467.4526391630.

The spelling of 102143997 in words is "one hundred two million, one hundred forty-three thousand, nine hundred ninety-seven".