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12402993 = 311336587
BaseRepresentation
bin101111010100…
…000100110001
3212100010201010
4233110010301
511133343433
61121501133
7210265221
oct57240461
925303633
1012402993
117001609
1241a17a9
132753565
14190c081
15114ee63
hexbd4131

12402993 has 8 divisors (see below), whose sum is σ = 16684128. Its totient is φ = 8195264.

The previous prime is 12402977. The next prime is 12402997. The reversal of 12402993 is 39920421.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 12402993 - 24 = 12402977 is a prime.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 12402993.

It is not an unprimeable number, because it can be changed into a prime (12402997) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 17955 + ... + 18632.

It is an arithmetic number, because the mean of its divisors is an integer number (2085516).

Almost surely, 212402993 is an apocalyptic number.

It is an amenable number.

12402993 is a deficient number, since it is larger than the sum of its proper divisors (4281135).

12402993 is a wasteful number, since it uses less digits than its factorization.

12402993 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 36703.

The product of its (nonzero) digits is 3888, while the sum is 30.

The square root of 12402993 is about 3521.7883241331. The cubic root of 12402993 is about 231.4775264411.

The spelling of 12402993 in words is "twelve million, four hundred two thousand, nine hundred ninety-three".

Divisors: 1 3 113 339 36587 109761 4134331 12402993