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38615897 is a prime number
BaseRepresentation
bin1001001101001…
…1101101011001
32200122220001102
42103103231121
534341202042
63455401145
7646141535
oct223235531
980586042
1038615897
111a885771
1210b231b5
138000858
1451b2bc5
1535cbb32
hex24d3b59

38615897 has 2 divisors, whose sum is σ = 38615898. Its totient is φ = 38615896.

The previous prime is 38615887. The next prime is 38615909. The reversal of 38615897 is 79851683.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 36132121 + 2483776 = 6011^2 + 1576^2 .

It is a cyclic number.

It is not a de Polignac number, because 38615897 - 24 = 38615881 is a prime.

It is a super-2 number, since 2×386158972 = 2982375002229218, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (38615887) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 19307948 + 19307949.

It is an arithmetic number, because the mean of its divisors is an integer number (19307949).

Almost surely, 238615897 is an apocalyptic number.

It is an amenable number.

38615897 is a deficient number, since it is larger than the sum of its proper divisors (1).

38615897 is an equidigital number, since it uses as much as digits as its factorization.

38615897 is an evil number, because the sum of its binary digits is even.

The product of its digits is 362880, while the sum is 47.

The square root of 38615897 is about 6214.1690514501. The cubic root of 38615897 is about 338.0041577164.

The spelling of 38615897 in words is "thirty-eight million, six hundred fifteen thousand, eight hundred ninety-seven".