Search a number
-
+
1990790903 is a prime number
BaseRepresentation
bin111011010101001…
…0000111011110111
312010202000122201102
41312222100323313
513034120302103
6525313320315
7100222305053
oct16652207367
95122018642
101990790903
11931827742
1247686609b
132595a17aa
1414c57cc63
15b9b93e88
hex76a90ef7

1990790903 has 2 divisors, whose sum is σ = 1990790904. Its totient is φ = 1990790902.

The previous prime is 1990790833. The next prime is 1990790941. The reversal of 1990790903 is 3090970991.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1990790903 - 216 = 1990725367 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1990790983) 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, 995395451 + 995395452.

It is an arithmetic number, because the mean of its divisors is an integer number (995395452).

Almost surely, 21990790903 is an apocalyptic number.

1990790903 is a deficient number, since it is larger than the sum of its proper divisors (1).

1990790903 is an equidigital number, since it uses as much as digits as its factorization.

1990790903 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 137781, while the sum is 47.

The square root of 1990790903 is about 44618.2799197818. The cubic root of 1990790903 is about 1257.9842850101.

The spelling of 1990790903 in words is "one billion, nine hundred ninety million, seven hundred ninety thousand, nine hundred three".