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29011972979 = 1187712232459
BaseRepresentation
bin11011000001001111…
…111001001101110011
32202212220010221002202
4123001033321031303
5433404031113404
621154455133415
72044641462413
oct330117711563
982786127082
1029011972979
1111338558780
12575807426b
13297478a822
141593136643
15b4c01021e
hex6c13f9373

29011972979 has 16 divisors (see below), whose sum is σ = 31724317440. Its totient is φ = 26312201760.

The previous prime is 29011972961. The next prime is 29011972981. The reversal of 29011972979 is 97927911092.

It is a cyclic number.

It is not a de Polignac number, because 29011972979 - 224 = 28995195763 is a prime.

It is a super-2 number, since 2×290119729792 (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (29011972909) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 11797052 + ... + 11799510.

It is an arithmetic number, because the mean of its divisors is an integer number (1982769840).

Almost surely, 229011972979 is an apocalyptic number.

29011972979 is a deficient number, since it is larger than the sum of its proper divisors (2712344461).

29011972979 is a wasteful number, since it uses less digits than its factorization.

29011972979 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4570.

The product of its (nonzero) digits is 1285956, while the sum is 56.

The spelling of 29011972979 in words is "twenty-nine billion, eleven million, nine hundred seventy-two thousand, nine hundred seventy-nine".

Divisors: 1 11 877 1223 2459 9647 13453 27049 1072571 2156543 3007357 11798281 23721973 33080927 2637452089 29011972979