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3990002121 = 327431472869
BaseRepresentation
bin1110110111010010…
…1001100111001001
3101022001220002221100
43231310221213021
531132420031441
61455531332013
7200606313150
oct35564514711
911261802840
103990002121
111768285716
129342b1009
134b7830b01
1429bcb0597
1518544ccb6
hexedd299c9

3990002121 has 24 divisors (see below), whose sum is σ = 6739853120. Its totient is φ = 2226976416.

The previous prime is 3990002117. The next prime is 3990002129. The reversal of 3990002121 is 1212000993.

It is not a de Polignac number, because 3990002121 - 22 = 3990002117 is a prime.

It is not an unprimeable number, because it can be changed into a prime (3990002129) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 733726 + ... + 739143.

Almost surely, 23990002121 is an apocalyptic number.

It is an amenable number.

3990002121 is a deficient number, since it is larger than the sum of its proper divisors (2749850999).

3990002121 is a wasteful number, since it uses less digits than its factorization.

3990002121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1472925 (or 1472922 counting only the distinct ones).

The product of its (nonzero) digits is 972, while the sum is 27.

The square root of 3990002121 is about 63166.4635783894. The cubic root of 3990002121 is about 1586.0773949045.

The spelling of 3990002121 in words is "three billion, nine hundred ninety million, two thousand, one hundred twenty-one".

Divisors: 1 3 7 9 21 43 63 129 301 387 903 2709 1472869 4418607 10310083 13255821 30930249 63333367 92790747 190000101 443333569 570000303 1330000707 3990002121