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5490781 is a prime number
BaseRepresentation
bin10100111100100001011101
3101022221221021
4110330201131
52401201111
6313404141
764446052
oct24744135
911287837
105490781
11311033a
121a09651
1311a32aa
14a2d029
15736d71
hex53c85d

5490781 has 2 divisors, whose sum is σ = 5490782. Its totient is φ = 5490780.

The previous prime is 5490769. The next prime is 5490787. The reversal of 5490781 is 1870945.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 3865156 + 1625625 = 1966^2 + 1275^2 .

It is a cyclic number.

It is not a de Polignac number, because 5490781 - 221 = 3393629 is a prime.

It is a super-2 number, since 2×54907812 = 60297351979922, which contains 22 as substring.

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

5490781 is a lucky number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (5490787) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2745390 + 2745391.

It is an arithmetic number, because the mean of its divisors is an integer number (2745391).

Almost surely, 25490781 is an apocalyptic number.

It is an amenable number.

5490781 is a deficient number, since it is larger than the sum of its proper divisors (1).

5490781 is an equidigital number, since it uses as much as digits as its factorization.

5490781 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 10080, while the sum is 34.

The square root of 5490781 is about 2343.2415581839. The cubic root of 5490781 is about 176.4187365155.

The spelling of 5490781 in words is "five million, four hundred ninety thousand, seven hundred eighty-one".