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3978497 is a prime number
BaseRepresentation
bin1111001011010100000001
321111010110202
433023110001
52004302442
6221134545
745550055
oct17132401
97433422
103978497
112278116
1213ba455
13a93b53
14757c65
15538c32
hex3cb501

3978497 has 2 divisors, whose sum is σ = 3978498. Its totient is φ = 3978496.

The previous prime is 3978479. The next prime is 3978511. The reversal of 3978497 is 7948793.

Together with previous prime (3978479) it forms an Ormiston pair, because they use the same digits, order apart.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 3682561 + 295936 = 1919^2 + 544^2 .

It is a cyclic number.

It is not a de Polignac number, because 3978497 - 26 = 3978433 is a prime.

It is not a weakly prime, because it can be changed into another prime (3978197) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1989248 + 1989249.

It is an arithmetic number, because the mean of its divisors is an integer number (1989249).

Almost surely, 23978497 is an apocalyptic number.

It is an amenable number.

3978497 is a deficient number, since it is larger than the sum of its proper divisors (1).

3978497 is an equidigital number, since it uses as much as digits as its factorization.

3978497 is an evil number, because the sum of its binary digits is even.

The product of its digits is 381024, while the sum is 47.

The square root of 3978497 is about 1994.6170058435. The cubic root of 3978497 is about 158.4551449199.

It can be divided in two parts, 3978 and 497, that multiplied together give a triangular number (1977066 = T1988).

The spelling of 3978497 in words is "three million, nine hundred seventy-eight thousand, four hundred ninety-seven".