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1397657 is a prime number
BaseRepresentation
bin101010101001110011001
32122000020002
411111032121
5324211112
645542345
714610542
oct5251631
92560202
101397657
11875098
125749b5
1339c221
142854c9
151c91c2
hex155399

1397657 has 2 divisors, whose sum is σ = 1397658. Its totient is φ = 1397656.

The previous prime is 1397633. The next prime is 1397681. The reversal of 1397657 is 7567931.

It is a balanced prime because it is at equal distance from previous prime (1397633) and next prime (1397681).

It can be written as a sum of positive squares in only one way, i.e., 1042441 + 355216 = 1021^2 + 596^2 .

It is a cyclic number.

It is not a de Polignac number, because 1397657 - 214 = 1381273 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 1397657.

It is not a weakly prime, because it can be changed into another prime (1397057) 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, 698828 + 698829.

It is an arithmetic number, because the mean of its divisors is an integer number (698829).

21397657 is an apocalyptic number.

It is an amenable number.

1397657 is a deficient number, since it is larger than the sum of its proper divisors (1).

1397657 is an equidigital number, since it uses as much as digits as its factorization.

1397657 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 39690, while the sum is 38.

The square root of 1397657 is about 1182.2254438135. The cubic root of 1397657 is about 111.8064524999.

The spelling of 1397657 in words is "one million, three hundred ninety-seven thousand, six hundred fifty-seven".