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29090921 is a prime number
BaseRepresentation
bin110111011111…
…0010001101001
32000201222020112
41232332101221
524421402141
62515304105
7502161116
oct156762151
960658215
1029090921
111546a492
1298ab035
136047282
143c1390d
1528497eb
hex1bbe469

29090921 has 2 divisors, whose sum is σ = 29090922. Its totient is φ = 29090920.

The previous prime is 29090911. The next prime is 29090923. The reversal of 29090921 is 12909092.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 18619225 + 10471696 = 4315^2 + 3236^2 .

It is a cyclic number.

It is not a de Polignac number, because 29090921 - 214 = 29074537 is a prime.

Together with 29090923, it forms a pair of twin primes.

It is a Chen prime.

It is an alternating number because its digits alternate between even and odd.

It is not a weakly prime, because it can be changed into another prime (29090923) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14545460 + 14545461.

It is an arithmetic number, because the mean of its divisors is an integer number (14545461).

Almost surely, 229090921 is an apocalyptic number.

It is an amenable number.

29090921 is a deficient number, since it is larger than the sum of its proper divisors (1).

29090921 is an equidigital number, since it uses as much as digits as its factorization.

29090921 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2916, while the sum is 32.

The square root of 29090921 is about 5393.6000037081. The cubic root of 29090921 is about 307.5524258995.

The spelling of 29090921 in words is "twenty-nine million, ninety thousand, nine hundred twenty-one".