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65112491 is a prime number
BaseRepresentation
bin1111100001100…
…0100110101011
311112112001112202
43320120212223
5113132044431
610243330415
71420306223
oct370304653
9145461482
1065112491
1133832a84
1219980a0b
131064a002
14890d083
155ab28cb
hex3e189ab

65112491 has 2 divisors, whose sum is σ = 65112492. Its totient is φ = 65112490.

The previous prime is 65112457. The next prime is 65112539. The reversal of 65112491 is 19421156.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 65112491 - 26 = 65112427 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (65102491) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32556245 + 32556246.

It is an arithmetic number, because the mean of its divisors is an integer number (32556246).

Almost surely, 265112491 is an apocalyptic number.

65112491 is a deficient number, since it is larger than the sum of its proper divisors (1).

65112491 is an equidigital number, since it uses as much as digits as its factorization.

65112491 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2160, while the sum is 29.

The square root of 65112491 is about 8069.2311281807. The cubic root of 65112491 is about 402.3043885733.

The spelling of 65112491 in words is "sixty-five million, one hundred twelve thousand, four hundred ninety-one".