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1398091 is a prime number
BaseRepresentation
bin101010101010101001011
32122000211011
411111111023
5324214331
645544351
714612032
oct5252513
92560734
101398091
11875452
125750b7
1339c496
14285719
151c93b1
hex15554b

1398091 has 2 divisors, whose sum is σ = 1398092. Its totient is φ = 1398090.

The previous prime is 1398083. The next prime is 1398107. The reversal of 1398091 is 1908931.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1398091 - 23 = 1398083 is a prime.

It is not a weakly prime, because it can be changed into another prime (1398011) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 699045 + 699046.

It is an arithmetic number, because the mean of its divisors is an integer number (699046).

21398091 is an apocalyptic number.

1398091 is a deficient number, since it is larger than the sum of its proper divisors (1).

1398091 is an equidigital number, since it uses as much as digits as its factorization.

1398091 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1944, while the sum is 31.

The square root of 1398091 is about 1182.4089816980. The cubic root of 1398091 is about 111.8180240034.

The spelling of 1398091 in words is "one million, three hundred ninety-eight thousand, ninety-one".