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400550089 is a prime number
BaseRepresentation
bin10111110111111…
…110100011001001
31000220201001102111
4113313332203021
51310020100324
6103425102321
712632422342
oct2767764311
91026631374
10400550089
11196111235
12b21879a1
1364ca4ab4
143b2a90c9
1525271794
hex17dfe8c9

400550089 has 2 divisors, whose sum is σ = 400550090. Its totient is φ = 400550088.

The previous prime is 400550063. The next prime is 400550099. The reversal of 400550089 is 980055004.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 335182864 + 65367225 = 18308^2 + 8085^2 .

It is a cyclic number.

It is not a de Polignac number, because 400550089 - 221 = 398452937 is a prime.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 400550089.

It is not a weakly prime, because it can be changed into another prime (400550009) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 200275044 + 200275045.

It is an arithmetic number, because the mean of its divisors is an integer number (200275045).

Almost surely, 2400550089 is an apocalyptic number.

It is an amenable number.

400550089 is a deficient number, since it is larger than the sum of its proper divisors (1).

400550089 is an equidigital number, since it uses as much as digits as its factorization.

400550089 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 7200, while the sum is 31.

The square root of 400550089 is about 20013.7475001560. The cubic root of 400550089 is about 737.1439025495.

The spelling of 400550089 in words is "four hundred million, five hundred fifty thousand, eighty-nine".