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129746439 = 3231465041
BaseRepresentation
bin1111011101111…
…00011000000111
3100001010210122200
413232330120013
5231203341224
620512525543
73133553334
oct756743007
9301123580
10129746439
1167269469
12375508b3
1320b5a254
141333598b
15b5cd5c9
hex7bbc607

129746439 has 12 divisors (see below), whose sum is σ = 193457472. Its totient is φ = 83707200.

The previous prime is 129746429. The next prime is 129746467. The reversal of 129746439 is 934647921.

It is a happy number.

It is not a de Polignac number, because 129746439 - 27 = 129746311 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 129746394 and 129746403.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (129746429) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 232242 + ... + 232799.

It is an arithmetic number, because the mean of its divisors is an integer number (16121456).

Almost surely, 2129746439 is an apocalyptic number.

129746439 is a deficient number, since it is larger than the sum of its proper divisors (63711033).

129746439 is a wasteful number, since it uses less digits than its factorization.

129746439 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 465078 (or 465075 counting only the distinct ones).

The product of its digits is 326592, while the sum is 45.

The square root of 129746439 is about 11390.6294382707. The cubic root of 129746439 is about 506.2501315043.

The spelling of 129746439 in words is "one hundred twenty-nine million, seven hundred forty-six thousand, four hundred thirty-nine".

Divisors: 1 3 9 31 93 279 465041 1395123 4185369 14416271 43248813 129746439